I mainly have two problems: 1. The mobile client logs out spontaneously (or crashes and logs out) every once in a while and I have to reenter both the password and the TOTP code. Cumbersome, and really inconvenient if I'm on the go and for example my plane ticket is in ProtonMail. (I don't know my password and keep it in a password manager, inaccessible from my mobile), 2. The web client logs out whenever the browser is restarted. The web browser at least remembers the password, but I need to interact with my phone to get the TOTP code in. This means that I end up in a state where I don't get notifications for new mails, and I have to go and deal with it proactively. They recently released the "bridge", which runs as a daemon and lets me access the mail via IMAP. This alleviates the problem, but it is unfortunately still unavailable for Linux.
Are there any other happy or unhappy ProtonMail users out there? Am I alone in these frustrations?