iphone 14 pro max problems

I have had my iphone 14 pro max for less than a year and about 3 days ago it started randomly shuting down or restarting and always when I need it. When it starts back up, the battery will sometimes be at 10% when it had maybe 75% before it shut down. It is doing some other weird things too along with this, but this is the most troublesome. It was fine before this and I don't remember dropping it or doing anything to it that could cause this that I can think of. Has anyone had any similar issues? I do take it in and out of the case daily to place it on a wireless charger. Any advise would be greatly appreciated.