Lines of off-hand fishing rods stretch when they shouldn't

There is an odd visual bug with fishing rods in the off-hand when the player is fishing. When the player is fishing and has the rod in their off hand, punching with the main hand causes the fishing line to stretch, as if the fishing rod had been used to punch instead.

What I expected to happen was...:

The fishing line didn't move at all.

What actually happened was...:

The fishing line was _funky and stretched, as seen in the video attached.

Steps to Reproduce:

1. Equip fishing rod in off hand

2. Cast the fishing line - water not required

3. Use main hand to break, punch, etc.
   (Note: this occurred regardless of if I was in the boat or not, and regardless of the weather.)