Minecraft Version

1.21.7

Version

1.116.1

Details

Minecraft version: 1.21.7
Fabric version: 0.16.14
CC:T version: 1.116.1

I ran a fresh lua terminal and ran
while true do print( os.pullEvent() ) end

It found all the other events I tried, including mouse_drag but not mouse_scroll.
I tried on all four placeable computer types, including turtles and computers.

I don't see anything in the logs that is pertinent, but here it is anyway
latest.log

#299 seems to be a similar bug, but from 6 years ago.

Thanks for the report! Looks like that's been broken since 1.21.2, annoying!