I must've misunderstood... so, what you're saying is that the slime was both prismatic and special, and it didn't drop the jelly? That's not intended.
hey eric! I literally just encountered this issue and made an account just to post about it in an old thread and stumbled on this one as well. I’m playing the most recent version on switch as a solo player, vanilla game/console. It was both special and prismatic, after I killed it it on level 5 in the regular mines, it dropped a level 2 Wood Club and the quest registered that I had killed the slime and to turn the jelly in, but alas, I had no jelly. Just for fun I took the club to the wizard but it was a weapon and ungiftable. It was definitely special and prismatic, I’ve done this quest several times on other saves and didn’t have this issue. I tried to take a 30 second rewind video but my storage was full, but I made some memory space in case I get unlucky again. I just wanted to let you know just in case everyone thinks it’s fixed, the few threads I’ve found seem to be closed.
I’m super excited for the new update and future game! 1000+ hours logged across 3 platforms, you’ve made the perfect game!
ETA: other people were having issues with co-op. I don’t know if it matters, but several hours before this instance, I was playing split screen with my husband on a separate save. When he went to sleep, I closed our split screen save, and loaded my solo save without closing out the game application- i just went back to the title screen and loaded my solo game, which nobody has ever joined. Don’t know if that matters! After I left this comment I reloaded the day and found the NON-special prismatic slime, it dropped the jelly no problem. A special prismatic must be crazy odds to not have a bug report for this in several years :P cheers!