I already reported that problem early and iA already fix that problem
nice.
No, it’s not, I fought uco 4+crab multiple times b4:
I never fought it with Crab 2.0 though, so I think it’s disabled there only. Could you disable uco with laser Crab & Crab 2.0 only? Don’t disable uco with Crab V1 & King Crab it’s fine with them, also I think RNG is a little buggy, for some reason only uco 4 appears with whatever Crab.
Also disable Mysterious Ship with any crab if possible.
Not yet, fred
yo yo yo lissen up to ma new rap
Or just decrease the chance of those
I dont wanna lose some of those extreme challenge
(multidiversity)
So far I was only able to defeat MS with Crab 1 only and it was extremely hard, but ok if you want.
Why he should add just for you?
Many persons suggested it but haven’t added.
That’s a bug. Crab+UCO should never appear together.
I’ll allow Crab+UCO for >=100% difficulty, but I can’t special-case particular combinations.
Fixed in v.76 
Bug
Different from what? It is expected for the location fluctuation, well, to fluctuate over time.