Duplicant Generator must be "inside" wall/natural tiles

This might already be a known issue.  Also.  This issue should be low-priority.

I've found that if i clear the entire map of all materials... the Duplicant Generator gate needs to be surrounded by a circle of tiles or the game will crash.

It looks like the circle of tiles can be quite small (just surrounding the gate),  or it can be quite big.  (roughly 3/4 the size of the map).

But basically if the volume surrounding the gate is a "large enough" empty space of gas the game crashes.  But if you surround the gate with a circle of tiles, then you can clear out the entire map of material without any issue.

I've attached a sample map.

Map Test.sav