No probs man, i’m open to any ideas at the mo.
Root CA cert is valid until 2031 
Good for you, some time left until action needed
So looking back on my plex logs it looks like this has been in place for a while and I’ve just never noticed.
I can looking at my sons plex history this change happened at some point between 05/01/2020 and 16/02/2020.
I’ll go through the logs on my NAS to see all versions of plex from then and then check the changelogs to see if anything is mentioned about changing secure.
Apologies for the double post but issue I believe is now resolved.
At the end of January 2020 I switched ISP from Sky Fibre UK to Plusnet. It appears it was this switch that caused the issue and is an issue with Plusnet DNS.
Luckily I’m using my own hardware so I’m able to change my DNS servers. I changed these over to google and it’s now working. TV is set to never fallback to insecure connections and is being picked up as my local LAN address with no transcoding applied.
I’ve been using Tautulli on my NAS for plex logging ever since I implemented plex, this offers a much granular way of logging for plex and without this It’d been impossible to determine the cause from so long ago.
Below screenshot shows the change for Plex from LAN to WAN at the end of Jan.
It was actually several root and intermediate certificates. The situation led to some devices having correct certificate chains, and others being broken. In my case I had a Comodo/Sectigo cert that was perfectly fine, and so was the root cert, but an intermediary was expired and the cert bundle on my Shield had not been updated. The fix was either to fix the chain in the bundle Plex used or to just switch to LetsEncrypt. I went with the latter.
Anyway, probably not relevant and is also clearly explained in the gist, but I felt the need to clarify again anyway.
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