I build the wall that close all gap and I use Ironclad door as the entrance.
When monsters appear, they don’t attack the door and stand around at the outside until they disappear.
I think I see a monster attack my door but that door is Stone Tunnel Door.
Or Ironclad cant be attacked by monster?
Not all monster can attack doors, I think just 1 in 2 orcs can, and other monsters can’t. Not sure.
@kanoktuch_poonsin_Me could you upload your savefile?
To upload a save, locate the folder in
C:\Program Files (x86)\Steam\steamapps\common\Stonehearth\saved_games (assuming a default Steam install), zip the individual save’s folder (not the entire saved_games folder), and upload it. If the *.zip is less than 10 MB, feel free to upload it directly to the Discourse. If larger, please upload it to a cloud storage site like Dropbox, Google Drive, File Dropper, etc. and post the sharing link here.
The doors you mention can be attacked by monsters, but as @BrunoSupremo says, not all monsters can attack doors.
O__O Wow, the first thing that happened when I finished loading your save was that the ogre that was closest to the door began attacking it.
Which color is the bar next to your speed controls? If you click on it you can see a breakdown.
Which are your computer specs?
Does save and reload (or pausing for a while, or restarting the game) help at all?
I took a look at it also (was curious 
), same thing as Relyss, ogre started beating on the iron door
After restating game, that big one start attack my door.
Ok it’s a bug but I still don’t know how that was happened?
I guess it was a performance issue? They might have been thinking too hard to realize that the door was there 
On the subject of performance:
To get a better performance I recommend selling all the trash you have. Do you really need all those items?
I suspect that the enemies’ pathing is one of the first things to go when the CPU is under too heavy a load. In a recent game which I’d played for a long time (I didn’t have a lot of stuff, but I was noticing slowdown due to both graphical issues and errors), I had goblin camps simply up and leave because they couldn’t find their way to attack the gates in my stone fences.
While this would be a reasonable decision if it’s the case (after all, having lots of enemies simulated while the game is on the edge of breaking down would mean it’s very hard to do anything about them; so making enemies be the first thing to start failing means that the town can be saved if the player manages to get their memory usage back under control); it’s also a great opportunity to give the player a warning that their CPU is being over-taxed.
One such option is to have the enemies send you a message, along the lines of “[random enemy in the group] say there big bugs in your town. We no like bugs, we going now before we get bugs too!”, and then have the game gracefully despawn those enemies to save some CPU load.
That would give the player a warning that they’re over-doing something, but it would do it in a rather amusing way. The message could have an attached explanation about what’s really going on, as well as suggestions for how to improve memory usage (and even a reminder/request to upload the save for Radiant to diagnose if the memory issue isn’t resolved by those steps).
i loaded up your save on my beast of a machine and they attacked fine you can save up on memory ifg you place the items that are in them stockpiles into storage containers that way instead of having to draw out each item all the game has to do is remember what item is in which storage place my main game with nearly 5k items runs decent across all 7 of my computers )mine my wifes my sons my daughters my laptop and my shit work machine and my antique windows xp machine that only has 1 gb of ram
