Trying to switch to Proton, but encountering issues

Hey all, hoping some more experienced Proton users might be able to help me out here.

Earlier this week I began the process of switching from Gmail to Proton. I imported the last few months of Gmail messages, set Gmail to forward to Proton for the interim before I can get all my other accounts switched away from that Gmail, and installed the Android proton mail app.

I'm having the following issues:

• Proton mail, regardless of if I'm in browser or mobile app, keeps reappearing emails that I delete or mark as spam. I'll delete them, then check my inbox again later and there they are again, unread in my inbox. It'll take 6 or 7 attempts sometimes before an email actually stays deleted.

-the Android app is sucking crazy amounts of battery. It's not like I receive an insane amount of daily messages, but yesterday Proton mail sucked 40% of my battery. That's from mostly idle use and deleting a handful of emails. That's it. It seems to be pulling an insane amount of juice in the background.

Anyone know how I can resolve these problems? I want to use proton for their focus on privacy and encryption, but both these issues are deal breakers for me if I can't resolve them.

Thanks in advance!