looks like some of the big "public relays" may have removed or othrewise restricted these kinds. try the relay settings at the top:
wss://nos.lol still has catallax events on it.
https://npub19ma2w9dmk3kat0nt0k5dwuqzvmg3va9ezwup0zkakhpwv0vcwvcsg8axkl.blossom.band/3d9659fd112ed808e6a88509273fe2f3be28dd9d74a26f387c7b309526d5f44c.png
https://npub19ma2w9dmk3kat0nt0k5dwuqzvmg3va9ezwup0zkakhpwv0vcwvcsg8axkl.blossom.band/b6bc2e6bab4b2836a13ad4ae5917a16871757573db70922b4e5583dd833b20b2.png