[Bug] Building deleted when you click on undo

Step to reproduce : Make a building, when he is finished click on the button undo in the building editor.

And also, I customized the roof of a house and they forget to finish the top of the roof.

This still happens in build 114

Can confirm still occurring in build 122

this still happens in alpha 4 and just had it happen to me for the first time, all windows, doors and resources just disappear, chairs and tables stay.