Using Safari 8.0.8 on Yosemite, the focus changes from the tag editor back to the post whenever I add tags, in some SE communities I'm a member of (not sure which ones do it,and which ones don't yet).
Here's what it looks like:
(couldn't make a GIF under 2 megs, sorry).
What's funny is that this is happening even now as I am redacting this, kind of like a "mise-en-abyme"...
EDIT: This question still hasn't been answered, and the problem still occurs. It's really annoying.
I made another video today that shows the bug, hope it will get fixed soon!
EDIT: Could this be because of the right-side yellow boxes, that usually overlap the footer when I have scrolled down all the way to the tags part of the page?
These yellow boxes are also refreshing themselves with new content every so often, so maybe in the processing of refreshing themselves, they make the page jump up to steer clear of the footer they are overlapping?
As seen here, the bars and footer looked messed up:
But here after the annoying automatic page jump, they've cleared away from the footer: