When using the NME, there’s an issue where blocks are unintentionally rewired. It’s similar to the issue that you fixed last month @Deltakosh, but I wasn’t able to find a way to reproduce it reliably until now. 
So to reproduce the issue, just drag an unconnected block onto the wire of a connected block like below.
This is actually per design 
cc @PatrickRyan
[NME] Shortcuts for search and placement · Issue #12148 · BabylonJS/Babylon.js (github.com)
Here it is happening when I just try to drag the block across a long wire, without stopping to hover at all. I think maybe the wire has to be long to trigger this auto-wire issue when you’re dragging across it without hovering/stopping like below.
oh I see the problem
The wire bounding box is used
Let me see how to fix that
Here we are:
Fix nme drop by deltakosh · Pull Request #13001 · BabylonJS/Babylon.js (github.com)
Sorry about the inconvenience!!
Awesome, thanks @Deltakosh! I’m pretty sure that’s the part that I was having trouble with when creating materials, not my first post/repro, so it should be smooth sailing now. 
Perfect !!