Despite having enchantsBlacklist = ["flimflam", "soulBound", "vanishing_curse"] set in the jeresources-common.toml file, vanishing_curse still shows up under usage for most things in JEI.

JustEnoughResources-1.14.4-0.10.0.66
Forge-1.14.4-28.1.109

I wrote the enchantment name wrong, it was "minecraft:vanishing_curse", woops!