Yes, I had the same experience. I tagged  nostr:npub1qtvl2em0llpnnllffhat8zltugwwz97x79gfmxfz4qk52n6zpk3qq87dze about it and  nostr:npub1wnlu28xrq9gv77dkevck6ws4euej4v568rlvn66gf2c428tdrptqq3n3wr replied saying it was actually working. But I don't think it was.

I've been mining on ckpool for 10 days now with no issues.