After recent changes some examples at https://babylonpress.org/ stopped to work because of this error. Most of them have Playground origin, and don’t work at PG too.
Example - https://playground.babylonjs.com/#NE96B8#10
If I change version to 5.30.0 seems the problem is gone.
@labris we will address hit ASAP and release a new build, sorry for the inconvenience and thanks for reporting.
Looking into it now
Fix is in PR: InputManager: Fixed up/down picking on callback by PolygonalSun · Pull Request #13250 · BabylonJS/Babylon.js (github.com)
PR has been merged
@RaananW could you push a new release ? I am afraid this one is pretty impactful 
doing that now, new patch coming up!