The netherite axes (I have not checked it with other tools), when using them they remain locked in their slot and you cannot move them. I don't know if it has anything to do with it, but the axes featured in the video had the item data equal to 167 (commands) or more (when using it).
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Thank you for your report!
We're tracking this issue in MCPE-115341, so this ticket is being resolved and linked 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
-- I am a bot. This action was performed automatically! Please report any issues on Discord or Reddit