there is apparently a small bug, one that I've just started noticing. The bug is when you set a miner to autopilot to an asteroid field, it doesn't automatically build like the constructors do, it just stops there and reverts to the 1 movement point for un-used asteroid fields, so I have to waste a turn to pull it back out and put it in.
Whatever it is, the game is just not recognizing the end point of the miners as an asteroid belt because its treated as a 'terrain' tile rather than a 'resource' tile.
its not a gamebreaking bug, but is a little annoying.
Also I'm using version 1.50 (latest version of both DL and DA)