Notices get stuck at the top of https://we.riseup.net/me if the related group is destroyed before the notices are dismissed.

I was testing some privilege related things, and I destroyed a group after removing a user from a group. The removed user's notices had not been dismissed, and when (after the group had been destroyed) I tried to hide the notice - following message was displayed:

Changes could not be saved
There are problems with the following fields
Redirect object can't be blank"

Now the notice just hangs out at the top of https://we.riseup.net/me and can't be removed. This also prevents the "Dismiss All" button from being used to clear other notices.