Interface becomes unresponsive when maanually deleting backups

Just that, if you click delete now, the browser locks up, and you can’t view any other tab short of opening a new separate tab & logging in again. it’s not that huge of a deal, I don’t do it often & usually wait for nightly cleanup to get things, but it is an inconvenience.

OS Windows 2012 R2
Browser Mozilla Seamonkey
UrBackup 2.2.11