Win7, GTX 640
Short description of error
When applying bevel with 2 segments, another uv map gets holes.
Exact steps for others to reproduce the error
Here we have a "hill" and it's UV channel (2nd channel):
We switch now to the 3rd UV channel (for example) and make bevel with 2 segments.
Do you see the texture gets cut? We are still looking at the map, which is set by 2nd UV channel.
Let's see, what happened in 2nd channel. We are switching back from 3rd one. And here it is