Yes, with the smartphone app you still can log, even as "inactive Member".
For example, i got "deactivated" long ago. (it's not clear for me, how it happened. I have not communication with Groundspeak about that.)
Nevertheless, it's like that. Even renewal of PM nor changing and validation of email-address helps against that).
Since i do not like the app, i just look for caches and do not log them online anymore.