When editing a command block it does not save the new command, the only way to get the command to work is by placing a new command block with that text. I tested this with no packs on whatsoever. From what I can tell it doesn't matter what command you type, so I'm using /fill in the video. This also affects all types of command blocks.
Linked issues
duplicates 1
Attachments
Comments 2

Thank you for your report!
We're tracking this issue in MCPE-185944, 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 (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
-- I am a bot. This action was performed automatically! The ticket was resolved by one of our moderators, and I left this message to give more information to you.