So I was using my Ipad pro (procreate app) drawing no previous issues, I hadn't recently updated, it is running IOS 15.5, mid use while I was drawing the ipad shut off I tried to do a reboot using the home button and the power button and nothing. I cant even get the apple logo its completely dead. The battery as it shut off was about 18% and it was plugged into the mains while I was using it. The back of the ipad was warm but not hot. What do you think could have caused the issue? Is it a motherboard issue? It has never been dropped, no liquids spilt on it.