Useful data, thank you.This is most likely related to a setting gone rogue. I experience the lock up ever since I upgraded to the iPhone 7 when it came out. That issue has persisted throughout every iOS version and device since then (currently running the XS with 12.2, settings app locked up for 20 seconds just now).
I‘m saying this because I handed off my old 7 and X to relatives and still manage said devices for them: they work flawlessly with no lock ups at all.
So the theory here is then that if I do a full wipe and then restore from my iCloud backup this would fix it? Or are you saying the bugged setting is carried through in my iCloud backup since when your relatives use the devices with their own Apple ID I assume, they don’t get this issue?