To be honest I’ve almost given up. I posted an issue in July 2019: Plex no longer recording full movies (UK) and there still hasn’t been a fix implemented.
I’ve pretty much resigned myself to forever manually extending the time of my recordings even though this worked great before they switched epg providers last year. It’s a royal pain in the neck. Their new EPG provider must be extremely slow in dealing with reported issues or just incapable of fixing them.