# Regression in animations in the last year **URL:** \ **Category:** Bugs\ **Created:** [February 14, 2022, 8:02am UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636 "2022-02-14T08:02:27Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![kmitov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/kmitov/32/4969_2.png) [@kmitov](https://forum.babylonjs.com/u/kmitov)\ **Post date:** [February 14, 2022, 8:02am UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/1 "2022-02-14T08:02:27Z")
Hi, We were just informed that some of the animations that we have were broken. We are not sure when did this happened. We are working with cdn. These animations were working for sure at 2020 > **[Bag 6 - Weight Machine - FIRST LEGO League 2020-2021 RePLAY](https://www.fllcasts.com/materials/1127-bag-6-weight-machine-first-lego-league-2020-2021-replay)** > > These are instructions on how to build the: > > > Weight Machine > > > You can find more building instructions and tips and tricks about the competition on this page. On the other hand other animations are working like > **[Bag 4 - Step Counter - FIRST LEGO League 2020-2021 RePLAY](https://www.fllcasts.com/materials/1085-bag-4-step-counter-first-lego-league-2020-2021-replay)** > > These are instructions on how to build the: > > > Step Counter > > > > You can find more building instructions and tips and tricks about the competition on this page. Could you help us understand what has changed with the animations in the last year and where the regression could be coming from? ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [February 14, 2022, 5:10pm UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/2 "2022-02-14T17:10:06Z")
When you say from the cdn, do you mean from [cdn.babylonjs.com](http://cdn.babylonjs.com)? Because nothing changes there ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [February 14, 2022, 5:12pm UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/3 "2022-02-14T17:12:23Z")
Well technically we moved to 4.2 in April 2021 so yeah something changed 🙂 can you repro the issue in the PG? (you can use version 4.1, 4.2 or 5.0 there) It is almost impossible to help you without a correct repro (here is the entire list of changes: [What’s New | Babylon.js Documentation (babylonjs.com)](https://doc.babylonjs.com/whats-new)) ---
**Author:** ![kmitov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/kmitov/32/4969_2.png) [@kmitov](https://forum.babylonjs.com/u/kmitov)\ **Post date:** [February 14, 2022, 5:44pm UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/4 "2022-02-14T17:44:39Z")
> When you say from the cdn, do you mean from [cdn.babylonjs.com](http://cdn.babylonjs.com)? Because nothing changes there Yes Thanks. I will check with 4.2. ---
**Author:** ![carolhmj](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/carolhmj/32/25918_2.png) [@carolhmj](https://forum.babylonjs.com/u/carolhmj)\ **Post date:** [February 14, 2022, 6:02pm UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/5 "2022-02-14T18:02:19Z")
Also FYI we’ll be releasing Babylon 5.0 in April so might be better to upgrade all the way to 5.0 🙂 we try our best to keep back compat but sometimes there have to be some changes 🙂 ---
**Author:** ![labris](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/labris/32/12576_2.png) [@labris](https://forum.babylonjs.com/u/labris)\ **Post date:** [February 14, 2022, 6:55pm UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/6 "2022-02-14T18:55:16Z")
> [@kmitov](#): > > I will check with 4.2. 4.2.1 is better 🙂 ---
**Author:** ![kmitov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/kmitov/32/4969_2.png) [@kmitov](https://forum.babylonjs.com/u/kmitov)\ **Post date:** [February 15, 2022, 8:10am UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/7 "2022-02-15T08:10:31Z")
Is there a way to ask the [sandbox.babylonjs.com](http://sandbox.babylonjs.com) to work with a specific version of Babylon? Because I just uploaded the file to [sandbox.babylonjs.com](http://sandbox.babylonjs.com) and the animations are broken. It will be really convenient if we can try the sandbox with different versions. The problem with the playground is that I have my files on a cdn that does not have Access-Control-Allow-Origin and thus we do not serve the files to [playground.babylonjs.com](http://playground.babylonjs.com). I will look if there is a place I could upload it without introducing an Access-Control-Allow-Origin to my server but having the sandbox and being able to select the version of babylon there will be super helpful ---
**Author:** ![kmitov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/kmitov/32/4969_2.png) [@kmitov](https://forum.babylonjs.com/u/kmitov)\ **Post date:** [February 15, 2022, 8:26am UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/8 "2022-02-15T08:26:29Z")
I kind of demonstrate it on [playground.babylonjs.com](http://playground.babylonjs.com)[https://playground.babylonjs.com/#0LC0DX#3](https://playground.babylonjs.com/#0LC0DX#3) It seems that for all versions available on playgroud this animation does not work. With is very strange as this animation was working for at least an year a few months ago. ---
**Author:** ![kmitov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/kmitov/32/4969_2.png) [@kmitov](https://forum.babylonjs.com/u/kmitov)\ **Post date:** [February 15, 2022, 10:25am UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/9 "2022-02-15T10:25:59Z")
I checked further with authors of the lego instruction and it seems the animation was previously prepared with one version of blender and was 3 weeks ago changed to another version of blender and I guess there is a mismatch in the way blender was storing the information about the animation and the way it is storing it now. Will further check. ---
**Author:** ![kmitov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/kmitov/32/4969_2.png) [@kmitov](https://forum.babylonjs.com/u/kmitov)\ **Post date:** [February 15, 2022, 11:53am UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/10 "2022-02-15T11:53:12Z")
Hi, After testing with all versions of Babylon in the playground it seems not to be a babylon issue. I will be looking into where the issue is. Thanks. ---
**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\ **Post date:** [February 15, 2022, 4:15pm UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/11 "2022-02-15T16:15:53Z")
Glad to hear (Well at least from my standpoint ;)). Good luck with your bug search! ---
**Author:** ![sebavan](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/sebavan/32/57_2.png) [@sebavan](https://forum.babylonjs.com/u/sebavan)\ **Post date:** [February 21, 2022, 7:17pm UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/12 "2022-02-21T19:17:09Z")
@kmitov you got me curious at “lego instructions” I can not wait to see what you are building 🙂 ---
**Author:** ![kmitov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/kmitov/32/4969_2.png) [@kmitov](https://forum.babylonjs.com/u/kmitov)\ **Post date:** [February 28, 2022, 4:56am UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/13 "2022-02-28T04:56:41Z")
Oh, we’ve built it and plenty of people are using it. You can check out at [buildin3d.com](http://buildin3d.com) and then one of the major platforms that is using it - [fllcasts.com](http://fllcasts.com) ---
**Author:** ![sebavan](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/sebavan/32/57_2.png) [@sebavan](https://forum.babylonjs.com/u/sebavan)\ **Post date:** [February 28, 2022, 2:31pm UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/14 "2022-02-28T14:31:33Z")
Niceee !!! keep up the good work there 🙂 ---
**Author:** ![kmitov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/kmitov/32/4969_2.png) [@kmitov](https://forum.babylonjs.com/u/kmitov)\ **Post date:** [March 3, 2022, 9:37am UTC](https://forum.babylonjs.com/t/regression-in-animations-in-the-last-year/27636/15 "2022-03-03T09:37:09Z")
Just wanted to let you all know that the animation is now working - it was not a Babylon issue - [FLLCasts | Bag 6 - Weight Machine - FIRST LEGO League 2020-2021 RePLAY](https://www.fllcasts.com/materials/1127-bag-6-weight-machine-first-lego-league-2020-2021-replay)