Hello,
The beta firmware seems great without any issues reported for Apex Legends. However I am getting a slight issue that may be caught during review from Apple; whenever I have the app opened and I place the phone on a wireless charging pad the app will quit every time. I can only get it to stay opened if I already have it on the charger, then open the app. This is on an iPhone XS Max on software version 12.3.1.
Edit - Will also happen when plugged into a power source, not just limited to wireless charging.