Home bases leave - if nothing is produced in the base - 15 minutes after the player has gone offline automatically the playing field. If something is produced in the base, the base does not leave the playing field until the production is finished.
If the player comes back online, his home base will appear again where there is room. Generally, but if possible only in the corners of the card. Each alliance has a designated corner on the map. If the corner is full it can happen that home bases are distributed further under the corner or randomly on the field.
This function cannot be deactivated.