+1 for this
I have 2 samsung TVs, on one it is very slightly slower than usual I think, but only 20 seconds, but on the other it does the circling loading, then about 4/5 minutes for the plex logo to come up.
On the one that is only slightly slower, I also noticed when I just tested it (it had been on the app and this only started at some point today) that I was signed out.
No updates on either server or TV (though I did update the server after the issue started, no improvement)