If you find it does that, like:

Album1 7/12 tracks

Album2 1/15 tracks

Album3 4/21 tracks

I just click and drag Album2 and Album3 into Album1

Privacy and anonymity are two different things. Proton doesn’t market themselves as anonymous, they market as a privacy service, as you said. And as for the info given to gov’ts, they were legally required to do so. No company, including Mullvad, will break the law for you. Mullvad/IVPN/AirVPN, etc, will all abide by law and give up info if required.