I have the same problem with the Paramount+ app on my LG TV. If the commercials that run before the episode are widescreen, it will stretch the episode from the original aspect ratio. Letting the episode play for about a minute, then exiting to the menu and resuming playback seems to pop it back to 4:3 for me.
Even if you get the ad-free plan, you might get “internal” commercials for other Paramount plus shows. Just pre-roll ads though. Also, the Paramount logo counts as an ad and you can’t skip it. I’ll never get those 5 seconds back.
hmmm. i have an old LG smart TV (webOS v1), I wonder if it would be possible to sideload the Paramount app to it, somehow, and see if it would work… I think it’s currently flagged as requiring webOS v3+
This ended up being the problem! I had it happen a few more times, always after ads, and backing out and playing did fix it. Thank you for the solution! Paramount really is a buggy mess of an app.