iPhone purple screen then phone crash on WhatsApp

2 days in a row my iPhone has frozen and crashed (my iPhone 13 pro 512gb). And both times it was while I was using WhatsApp, I’m mid writing a message, then the screen becomes unresponsive, after a few seconds it turns purple, then the phone crashes entirely and reboots, like wth, I’m mid text and it just crashes, I don’t get it, I just checked and both WhatsApp and IOS are fully up to date so idk. I’m hoping the next update will fix it.