Summary: When your holding a fishing rod in third-person, your main hand doesn't move like the off-hand does. It only affects fishing rods, not anything else (even the Carrot/Warped Fungus on a stick isn't affected)
Steps to reproduce:
Give yourself a fishing rod (doesn't have to be enchanted)
(Optional) Turn "View Bobbing" Off (this helps make it more noticeable)
Go into third-person mode and start walking in a flat area
Observed Result: The main-hand doesn't move
Expected Result: The main-hand should be moving
Video: Yes (sorry if it's too fuzzy or blurry to see the bug, I retried the video many times but I can't do anything about it.)
Linked issues
duplicates 1
Attachments
Comments 3

Thank you for your report!
We're actually already tracking this issue at MCPE-94201, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Thank you for your report!
We're actually already tracking this issue at MCPE-94201, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki