Wikimedia Bugzilla is closed!

For the past few weeks when editing if I click on "Show preview" the refresh jumps to the bottom of the page near the editing window rather than stay at the top where it belongs. Meanwhile the editing window reverts to its top rather than staying at the line where I was editing. This is annoying. Any help would be appreciated.

Fixing this problem would be good, but an even better idea is to have the preview page jump to the analogue of the line being edited. Is this a possibility?

Thanks.