An addon/ extension/ plugin/ plasmoid/ widget (use your favourite terminology) was often the cause of graphics (related) crashes I’ve experienced in the past; seemingly triggered by network activity.
Systematically removing these and waiting, or checking applicable logs (which I’m guilty of not doing) can often help diagnose.
I’m not a programmer; I’m unable to explain explain the “why” in succinct fashion; only offer my observations, but perhaps it may be related.
This is installed by default, at least, it was on my system. It displays only Manjaro system related updates, which in itself can be a handy feature.
For example the last notification via Matray linked to: [Stable Update] 2023-10-04 - Kernels, Systemd, LibreOffice, NVIDIA, Mesa, GNOME, AMDVLK.