Pufferfish will affect you if you are in creative and give you the effects nausea, hunger and poison.
How to recreate
1: Eat a pufferfish in creative mode
Expected
Pufferfish does not give the creative player any effects
what actually happens
Player will gain the effects nausea, hunger and poison
Note: this may also be an intentional feature, but there is nothing about it that i could find and wither roses aren't supposed to give effects in creative
Attachments
Comments 2
I'll be resolving this ticket as Invalid as there is no issue here. Like other foods, if you eat an enchanted golden apple or some suspicious stew, you'd expect to be provided with the potion effects regardless of your game mode. Altering how consumables behave in different game modes would be considered a feature request.
This is a change request, not a bug.
Item consumption of any kind affects the player regardless of game mode, if it didn't, potions wouldn't work.
Mobs attacking and placed blocks affecting are something very different (and pufferfish attacking was fixed in the past).