I’m assuming your on iOS13? There have been quite a few different bugs people are complaining about and it seems like it’s very random on each device. I’ve had persistent keyboard issues with predictive text and other annoying bugs pertaining with typing text. None of the updates have corrected them and I’m almost ready to restore as new and deal with setting up the phone instead of using a backup. Everything else works well though so I’m on the fence with the nuclear option but, it has corrected issues I’ve had in the past on iOS10 and 11