Earlier quoted context omitted.
So also a proton customer here. "By default we do not keep any IP logs" and this case does not seem like the default? Seems like they were required to by law to log and turn over this specific IP? (Of course I haven't seen the actual case but I would assume that meant a warrant.)
If this doesn't matter, what's important for you about being a Protonmail customer? (also a paying Protonmail customer)
No service is capable of completely hiding IPs and still getting you the data. If you "threat model" includes hiding from Western governments, I'd recommend not using the internet.