If you talk about compton change to picom, then is from quite few months back, by upstream.
Is part of the perl, inherited package from Arch linux. Manjaro made no changes of it.
Then i suppose you use Tilix as your terminal.
Have you read the announcements ?
but from what i know, that was addressed.
Another comment points to this:
Most of this issues are spotted in unstable and testing branches, fixed and rarely get to stable. If unsure, please read the latest announcement. Usually are provided some fixes for known issues and people report back other inconsistencies.