Deleted Polls are not displayed correctly due to cached rewriting

[Medienbecken]

Hello,
I think I've found a bug. After deleting a poll, there is some sort of custom 404 page that is displayed.

Due to rewriting (that is cached) it adds a / (slash) behind a given url. If this happens the links are created in a wrong fashion and the css is not found.

I hope these examples make it more clear:

working: https://dudle.hs-weingarten.de/Bester_Lehrer
not working: https://dudle.hs-weingarten.de/Bester_Lehrer/

As I said, the browser cache forces you to use the second example.

Is there a known solution to the problem?

Thanks for your help!

Best wishes,
Benjamin