Imported Embed not Displaying correct

I have the RSS polling plugin installed.

It was working as expected until recently. It seems like it is messing up some of the embedded video code

See link below. The large blank areas is where video is supposed to be showing

This has also affected an imported feed from another Discourse forum.

I am running Tests-Passed currently up to date.

Could unformatted code detector Theme component be messing with the import? Though hadn’t previously caused any issues.