Describe the bug

I tried highlighting some text in a command block using shift + right arrow, but when scrolling to the right enough, it just crashes.
I messed around with it, and it happens in singleplayer and realms, it doesn't work going left, only right. It seems to happen when the whole bar appears highlighted.

Modpack version

4.7.3

Launcher

CurseForge Launcher

Other things

• I updated FO to a newer version (mention, what version to what version)
• I added/removed some mods or resource packs (mention, which ones)

Additional context

https://mclo.gs/dch3y0D

Try updating Debugify to the latest version, I think that'll fix it.

Version 4.8.0 contains updated Debugify, please test and tell us whether it is fixed.

Fixed.