Game mode: :(Online private | multi-player] Type of issue: : [Bug] Server type: :: PvE] Region: [NA]
[Describe the bug here]
We seem to have difficulty with the DLC foundation pieces. The Aquilonian, Khitan and the Frontier will not stack on top of one another. I had built a castle a couple weeks ago and there they would stack. Now when trying with the foundation pieces it will give you an error. However, the black ice, the insulated and the stone will all stack no problem. This seems to be only the DLC pieces. When a DLC piece is placed, a vanilla piece can not be placed on top of it either. The Black ice for example will stack no problem on each other, but will not stack on a DLC piece.
Please provide a step-by-step process of how the bug can be reproduced. The more details you provide us with the easier it will be for us to find and fix the bug:
Place a foundation piece on the ground.
Attempt to place a foundation piece on top of it.
Again, this is only the DLC foundation pieces I have found this with. Others on discord have reported the same.
Thanks for bringing this to our attention. I tried to quickly reproduce this and was able to stack all foundations. However, I have run into some instances where no foundations would connect to each other at all, usually under water.
If you switch to a different location, are you able to stack different foundations on top of each other? If so then it could be a different issue entirely. I notice that you’re also playing on a private server. Is it running any mods? Just wanted to check for any compatibility issues.
I second Jens, are there any mods running? I know of a particular issue of what could cause this with a mod, especially a mod that hasn’t been updated in a month or two (though the issue could still be there if they did update the mod but didn’t update the blueprint) and also happens to edit a particular building blueprint.
I think they’re just bugging out, which happens a LOT.
Like when you’re placing a row of foundations and suddenly one on the end won’t snap… so you encircle it in foundations, then you can snap it in and remove the extra ones around it.
I do have mods, yes. When I noticed this was happening I removed them and tried without them to see if it still happens and it does. The problem I showed was under water but just a few meters away that build has a large part on land and they will not stack there either. I can get the insulated wood, black ice and brick to stack underwater but the not the DLC pieces.
I am aware of the trick to get them to place where you place one’s around and that one you are trying will snap back in however, I tried that for a couple hours and in this case, it will not fix the issue.
After much checking into my mods, removing mods and figuring out why the DLC foundations wouldn’t stack. It turns out, when I removed Age of Calamatious and left Pippi, Pickup+ and less building restrictions. I was able to stack the foundation DLC pieces again. I tested that each mod at a time, the only mod that prevented us from placing the DLC foundation pieces on top of each other was Age of Calamitous.
I tried to quickly reproduce this and was able to stack all foundations. 
However, I have run into some instances where no foundations would connect to each other at all, usually under water.
