Hi Iron-Ham thank you for taking the time to report this bug!
The second issue you report, the one with bottom insets (with an example on Youtube), I fixed very recently, so it should be available soon.
The first issue, the one with the imge close button being cropped on Reddit, I honestly think it is a bug on Reddit's side. Their web UI has been janky for a long time and it seems like every week they tweak something and I have personally noticed the close button for images to move almost daily sometime. I haven't been able to reproduce this issue, so I'm tempted to classify as a "Reddit quirkiness" that we all have to live with 😅
Please let me know if you see it reappear and can consistently reproduce it on Orion?
Nope, I could reproduce. It's not (just) Reddit.
Thank you for your help in making Orion a better browser!