I have just played a game and found out that dying while queueing up units to be built causes you to lose control of all assets. Switching command does not help either, as your allies then lose control too. When you try to select a unit or building, you select it for about .2 seconds, which then it becomes unselected.
Note: I was the server, and was sniped out of my ship.
I've been hit with this one too, at the start of a game. It sucks.
are you sure it happend in 1.3? or in 1.2?
anyways, just look at the recycler (or factory if you queued units there) and click space..
it happens when you que up units to build, then the game doesnt start building. Just select the building with space, you may need to hold multi-select, then cancle the build or start it or something. That fixes it.