Can confirm on both Beta 1 and 2. Right after updating to Beta 1, Mail app was draining the device like constantly so I even had to delete the built-in Mail app. Now with Beta 2 I had to delete the local provider's account so that the Mail app wouldn't display a lot of garbage. Can't be re-added, failing on SSL issues. After force-adding, I'm getting -65554, MFMessageErrorDomain:0, and other goodies.

This exactly! Magic Mouse trapped in a backpack. Just happened to me. 🤦‍♂️ Same trouble, same solution. 🤣👍

I've reported my issue mentioned below as FB15490379 👍

Yep, other than our own APIs I can see issues with Firebase, AppsFlyer, Exponea probably as well just in our project – quite a bunch of 3rd-parties utilising their own internal URL session instances.