PLEX: Not available outside your network

I’ve been running PLEX for less than a month and also have PLEX Pass. Just to stream files in side my house. Tonight I came home and ran into the “not enough bandwidth to play…” issue while trying to stream from a laptop that has never given me any issue with PLEX before.

Running 1.5.5.3634 on Win7 Ultimate (latest updates) and after searching here and on Reddit I tried setting inbound/outbound rules in Win firewall and resetting my router. I’m not using any NAS. In the end I restarted my PC and it seemed to “fix” itself. I’ve never forwarded any port for PLEX. It seems on the official forums there’s tons of debate regarding rollbacks and whether this is affecting more users.

Pics of before and after:
before
after

Any idea how to prevent this from happening again?

Note: Just using it with the PS4 App, Smart TV app (Tizen OS), 2 Androind cellphones and 1 Win 10 laptop. PMS is in my Win7 always-on desktop. Totally household use.