Commands applied (like guard) to Flying unit fails if the unit is outside map boundaries.

[full mauve]

For example, a flying builder is turning around a structure it is building at the edge of the map.
From time to time it will go out of map boundaries.
When it happens, i can't add builders to help with guard command.

even worse, when the main builder jumps to another building, if it is outside the map, the guarding builders fail to "repeat" the guard command, and just stop.