The keyboard is a bit buggy, won’t always disappear or appear when you want it to. Spotlight sometimes messes up and Carplay maps start off way too zoomed in or out. Otherwise, no real notable problems.
The keyboard is whats buggy for me as well, no specific app as it seems to be all of them at seemingly random times. Most other things have been pretty stable for me. Carplay i use waze so i didnt notice the maps issue.