Remote Access is checked through plex.tv domain: Bug or Feature?

[mgutt]

What I did:

• changed remote Plex port to 443
  

  

• set server URL to “https://plex.example.com/, http://192.168.178.9:32400”
  

  

• open port 443 in my router, which targets a reverse proxy, which targets “http://192.168.178.9:32400”
  

  

By that everything works:

• local access is done through https://192-168-178-9.123456.plex.direct:32400/ (valid SSL)
• remote access is done through https://plex.example.com/ (valid SSL)

But Plex claims not being accessible from outside:

After massive testing I found the reason:
Plex isn’t checking the remote access through my domain https://plex.example.com/ as I would expect, instead it uses https://plex.tv/ which is strange as this domain should never resolve to my servers public IP.

So I solved it by adding “plex.tv” to my reverse proxy (which by the way isn’t mentioned in any support article):

But finally it looks like a bug to me or is there a specific reason why Plex uses it’s own domain to reach my server?

[Volts]

When Remote Access is enabled, Plex attempts to auto-discover and register your public IP address & an associated magic https://ip-ad-dr-es.plex.direct URL.

Independently, Plex will always register the Network → Custom server access URLs. (Note - it’s also possible that having SPACES in that field will cause problems. You might remove the space.)

Plex will always register any valid Network → Custom server access URLs. Even if Remote Access is disabled.

So, if you want only your Custom URLs to be used, and don’t want the automatically discovered Internet IP address (and *.plex.direct certificate) to be used, simply disable Remote Access → Disable Remote Access.

[mgutt]

@Volts

So, if you want only your Custom URLs to be used, and don’t want the automatically discovered Internet IP address (and *.plex.direct certificate) to be used, simply disable Remote Access → Disable Remote Access .

I don’t want to disable *.plex.direct.

The only problem is, that plex tests the remote access by opening https://plex.tv with my public ip address. Instead I would expect:
https://plex.example.com/ (my domain)
or
https://pu-bl-ic-ip.123456.plex.direct/

This is not relevant for the remote access in general as it’s working perfectly. It’s only relevant for the remote access test / status message displayed in the WebGUI. I could ignore it, but I want to make the devs aware of this (in my eyes) faulty remote test.