Gallery behaves strange I found a prove (also Notification Field is buggy & 404)

I found now this while roaming my Profile:
When opening a Picture in the same Tab not "open in new Tab" and then click "Back"
Pictures are vanishing. The Site must get refreshed to get all the Pictures shown again.
This is static!

A minor side Note:
Since the Dark Mode came the Notification Field is buggy sometimes it doesn't close automatically when clicking or scrolling the page I've to click on the Bell Icon again to close it but here I've still no idea what's going on.

Before:

After:

Last but not least:
Whenever I publish something in Discussions the next site that opens is >

Hope that helps somehow.
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