I am fishing, I caught a slippery eel.
With another active food buff from a fish feast, I ate the eel and cast my fishing line while eating.
Maybe 5 or so seconds into eating I realized the mistake, and moved to stop eating and stop fishing, so I could keep my appropriate food buff.
Then, out of curiosity and to test something else, I went to eat a slippery eel again, and got an error that I “cannot use that item yet.” - Huh?!?
Reloading my ui did not fix this.
Logging off and on did fix this.