It seems that something is very wrong with snow bricks. When i right click them with another block in my main hand, snow bricks get replaced by those same blocks i hold in my main hand. This is for latest 1.16.1 version, Quark-r2.2-260 to be more specific. Sorry for rant and if this issue is already known about.

Very likely you're just suffering an ID desync. Can I get a log?

latest.log
This is example log. I hope this helps