Seems like the problem lies in kservice-git package.
I am quite sure it was pulled by installation via manjaro architect. No idea why are kf5-git packages pulled in by default insead of regular ones…
After removing the package and installing non-git version, the issue does not seem to return anymore.
sudo pacman -Rdd kservice-git ktextwidgets-git kwallet-git
And install back regular package version:
sudo pacman -S kservice ktextwidgets kwallet
Edit:
- ksycocoa did not do any unnecessary file updates for about an hour now.
- no need to delete mimeapps.list anymore.