@pixelfed I've downloaded the App on December, 5th. So the newest Version I guess. But I've already had the same Problem with the last version.
On the same day I also updated pixelfed to the last commit on the dev branch.
I'm completely logged out, as soon as I enter my URL the app shortly switches to a browser and back and then loops endlessly.
@tokk Sounds like partially corrupted app data, can you uninstall the app and re-install or clear all app data and try again?