How to reproduce:

1) Get a custom potion based on water

/give @p minecraft:potion{Potion:"minecraft:water",CustomPotionEffects:[{Id:17,Duration:1200}],display:{Name:"\"Custom Potion\""}}

2) Use it on dirt

Expected behavior:

• you will attempt to drink the potion, no interaction with the dirt whatsoever (this should affect only plain water bottles without custom effects/colors)

Actual behavior:

• potion is used on the dirt consuming the potion and changing dirt into mud.