Resolve aspect ratio issue

I cut a video in 16:9 then had to make a social teaser cut in 9:16. I duplicated the 16:9 sequence, changed the aspect ratio to vertical and did my cut down. Now, when going back to the 16:9 sequence, some of my multicam clips are showing up cropped (see attached photo) when nothing else has changed. I've tried deleting render cache to no avail.

Anyone else experience this bug?

https://imgur.com/a/YZ0Kf3n