Hello!
I’ve created a video on this, you have to see it in motion:
https://babylonjs.nascor.tech/boxes/nme-bug.mkv
https://nme.babylonjs.com/#2BSL82
There was no error in the console.
Guys, I couldn’t reproduce the error after I’ve refreshed the page, but maybe you will find out quickly, what could cause the problem.
Thanks!
R.
Rats… I’m not able to repro either 
If I remember correctly, it has happened after I’ve connected the remap block.
EDIT: and there was a gradient block connected before. Didn’t see the source code, but I’m sure all connections/disconnections on all nodes are handled at one place, so it shouldn’t make difference. 
Yep even with that I cannot repro
Ok, I will always record my screen when I’m working in the NME, so if it happens again, we can track back to the source. But I bet it will never happen again 
Ok, I’ve catched one of the little bastards bugs
https://babylonjs.nascor.tech/boxes/nme-bug-1.mkv
https://playground.babylonjs.com/#2W15F7#7
R.
@Evgeni_Popov do you mind having a look?
Sure, here’s a tentative PR: