Since updating in December 2020 to 12 pro Max my text messaging is very inconsistent. It sometimes freezes for hours where I can't receive or send messages. I've worked with advanced consultants at Apple and they haven't been able to help me fix this after 30 or so attempts, hours on the phone and diagnostics sent to the engineers. Does anyone else have this problem? It's random as to when it happens and sometimes days at a time. My texting works on my computer so im not completely stuck but Im really to the point of wanting to start a class actin lawsuit.