How to reproduce. 1) You are playing the game and you have several units and several workers. 2) A worker needs orders and is selected. It is standing nearby to a city. You are wondering, hmm... which tiles in this nearby city are being worked that might need an improvement so you..... 3) Without moving the worker, click a city once to check its details so you can see which tiles they are working. Ok, now you know where you should move your worker. 4) Cose the city details 5) WAIT! What happened to my worker? My worker unit is no longer active? Now I am focused on a battleship unit on the other side of the world! <BUG> 6) Well, maybe if I just click "Previous Unit" that will work. NOPE! Previous unit takes you to a totally different unit. <BUG> Result: If you want to give orders to your worker you need to either search the map and find it, or move ALL the other units until the worker becomes active again. AAARRRGGGHHH!!!!!!