Bugzilla preview does not work

Hi all,

I just wanted to submit a bug ticket for a port and found that the Bugzilla preview window does not work at all — its output is just blank. I've tested this in Safari and Firefox with all ad blockers off. There's no error in the JavaScript console.

Is this expected behavior (would be very surprising to me) or does this need to be fixed? In any case, I thought I'd raise the issue here.

Best,
Marcel