Tried the Chronocam feature a few minutes ago to see why my Nuclear Sub was destroyed (still no clue idea^^) after the Chronocam i was unable to select units or command them. I could still give commands to my factories, i could build units, but i could not command them. It was like i was frozen between the Chronocam and the normal game. Is this a known problem? is there a way to solve it?
Not sure if it's really know, but it's happen for me on Windows. Still not found 100% way to reproduce it. Quit game and reconnect, this is always helps.
I take it you tried pressing END? It makes sure the cam is completely back into game-mode not watch mode.
You've gotten most of the suggestions so far (toggle back to main, end then hit END to make sure you're at the end of the timeline). There may still be some actual problems occurring, however.
