Higher battery usage with e/OS 2.8

Hi all,
I flashed the 2.8-a14 version (sideload) on the OnePlus 8 Pro.
So far so well. It looks like the battery runs down more quickly than before.

Is there anything known?

Another Problem: Since a while I get an authentication error for my account (…@e.email).
The 2FA (TOTP) is active and I use a app-password for the e-account.
I have access to the calender, nextcloud and so on, but about all 1 to 2 hours I get the error message(see screenshot).

I’m on a OnePlus Nord N200 and it seems the usage is a bit high. I went from Android 12 to /e/os A14 so I don’t have a comparison to the previous version of /e/os.

What I did notice in analyzing with AccuBattery is the phone not staying in deep sleep as long. My OEM Android instance would keep the phone in deep sleep 95% of the screen off time. I only get deep sleep 80% of the screen off time with a14. So something keeps waking up the phone. Haven’t been able to nail anything down at this point.