could not recognize the Item in the Dispenser

https://imgur.com/FbypjIm
https://imgur.com/iVYJ6Xn

i put some wheat and it cant turn into wheat flour
i tried to craft luckyblock also,it have the same problem,
maybe more item do the same but not found yet

CraftBukkit v1_14_R1

CS-CoreLib vDEV - 78 (git 199e1b1e)
Slimefun vRC - 2 (git 4bb9abd)
SlimefunLuckyBlocks v1.1
ExoticGarden vDEV - 22 (git a855f5b7)