when using the mod Pick Block Pro middle clicking while in creative no longer works as it always grabs air instead of what you're looking at/light blocks if picking the sun

Issue was also posted on my mod: Sjouwer/pick-block-pro#16
I did some testing and found no issues with Pick Block Pro, seems the issue is with Litematica instead:
#22

I found! The problem is really related to the "Litematica" mod.

Litematica > Configuration Menu > Hotkeys > pickBlockFirst.
Сhange the assigned "button 3" to any other.

I think I will close this for now, in the planned rewrite I will likely remove (normal) air support (keeping cave and void air).
If this is still an issue after that rewrite feel free to open a new issue.