Windows Prismatic Jelly quest

[sima]

I killed the prismatic slime (in regular mines), but it didnt drop prismatic jelly, I got sneakers instead. It says on wiki that jelly drop rate shoud be 100%, I'm not sure if it's true, but in the quest menu "slay a slime" part is marked as done, and now I need to bring jelly to wizard.

My version is v1.6.14 build 24317
I'm playing in singleplayer, windows 10 (laptop)
Savefile is attached.

 

[danieliii]

It is possible for a Prismatic Slime to be a special slime. In this case, the Prismatic Slime will only drop one of the special items and will not drop the intended Prismatic Jelly.
(Copied from wiki)