I've sent troops to Island Quests 2 times so far and they disappeared once got there, both times. "Units stationed so far: 0" and I can't find them neither on "Defence" nor on "Outside". If I open the "Commands" it says processing, nothing there either.
I sent 107 slingers to attack a bandit camp. The report shows that I lost 2 so 105 should have returned. I was then away from the game for a number of hours. When I returned - no sign of my slingers. They were not shown as being en-route, they have simply vanished. The report of the attack on the bandit camp was the last report. This is the second time I have had to report a bug in the last 2 weeks.
Guys I think if you lose your troops just send a ticket in. Refresh as a starting point but if you still can't find them I will take a look at your account and see what is going on.