Pressing F5 to toggle the HUD off will still show the fishing rod’s HUD, if you’re holding the fishing rod.
The button indicators are turned off, but not the wooden HUD box as well as the info text for the current bait used.
edit: this seems to apply to any held weapon that adds additional HUD elements, like the wowozela.
Steps to Reproduce
Hold fishing rod, press F5.
Hold wowozela, press F5.
What I expected to happen
No fishing HUD when pressing F5.
No wowozela text when pressing F5.
What happened
Fishing HUD, wowozela thing, etc.
Notes / Media
N/A