Updating to 5.2.2 seems to be the common factor.
A thought: Previous versions are available in the ‘Attic’ with .apk files for various CPU types:
KDE - Experience Freedom!
Would it be wise/sensible to uninstall 5.2.2 then sideload an .apk for a previous version?
Right now I should say that I don’t know the answer to that question.
Note: 5.1.5 is not in the attic. It was a bugfix release for Android:
Krita 5.1.5 Released