The only thing we can do to fix it is by removing them from the frame and putting it back again but as you can see we have a lot of of these here and that technic takes a long time.
Thanks for considering, an fixing this bug !
PS: We have checked several times if the map was really compkete and it is
Thank you for your report!
However, this issue is a Duplicate of MCPE-46154.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki