I was testing an issue with nostr:npub1clk6vc9xhjp8q5cws262wuf2eh4zuvwupft03hy4ttqqnm7e0jrq3upup9 where he had a trailing / on filter.nostr.wine/

I tried adding it just like that and then it got “stuck” for me too. After removing it a dozen time and some refreshes it eventually worked.