There were two causes for the Remote Access availability status getting lost:
- A regression in early 1.19.2 betas which is now fixed in 1.19.2.2737,
- Timeouts during TLS dialogue exchange when doing a connectivity test. This is awaiting a change to the timeout period on the back-end plex.tv systems that do the remote access connection testing.
A Plex Media Server log with verbose logging enabled and covering the time when a connectivity test is done would confirm if the issue is down to the timeout problem