This bug doesn’t let you take arrows out of your offhand (but I’m assuming it also affects totems, shields, etc) It’s really annoying because you can’t throw them out or add more arrows to it. The only way to stop it is by shooting every single arrow, and then picking them back up.
Linked issues
duplicates
Attachments
Comments

Thank you for your report!
We're actually already tracking this issue at MCPE-70591, 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