I have had a problem with doors disappearing. Passive mobs would get out of their rooms or I would suddenly find a creeper in my home. I noticed it was always certain doors and eventually figured out why: any door I had mounted to only glass blocks would occasionally disappear when loading the world. To make it easier to spy nearby hostile mobs when I leave a building I will often frame a door in all glass blocks so I can see any waiting near that not at the door. I had one door that was never disappearing one where I had mounted a storage crate next to the door because of limited space in the small building. Since figuring this out I’ve made it a habit to alway make one lower block on the hinge of a door a crate or a plank and it seems to be promising.
doors had been more likely to disappear when upgrading from one Minecraft beta version to the next but I’m not sure that’s the only time they did, I didn’t always notice right away.
steps to produce
Construct a wall made of glass, at least 3x3. (A 3x3 may not be Cesar you but that’s what I usually use)
leave a 2x1 opening in center of wall
pick a wooden door and place it over this opening
save the world
At some later play session load the world. (After migrating to new world seems to be most affected.)
examine wall
observation
door is now missing allowing mobs to roam freely through wall. A replacement must be crafted.
expectations
door does not disappear
Related issues
duplicates
Comments


not very often but I have had it happen a coupe times. never anything I was paying attention to and it would appear i was wrong about it being glass wall frames as a couple doors I had placed in my artifical village (I created one) were gone one day when I strolled few. The village is well lighted and is surrounded by a fence so it's unlikely zombies came through and broke the doors. The village building used wood plank frames. think i last noticed it a month or two ago but until recently i had not been playing often.

Thank you for your report!
We're tracking this issue in MCPE-95162, 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! The ticket was resolved by one of our moderators, and I left this message to give more information to you.
I could not reproduce the issue. Is this still an issue for you?