First this happened with IoTP now DB..this is the problem.
You send all you generals to an adventure, they have assigned troops
The ones that do not have to space to land (straight away) have their troops disappear until the adventure is done, these troops will be visible until the travel time count down has been completed.
This is annoying as hell so please can you get a wiggle on a fix it and poses three very large problems:
(1) Once upon a time the generals would land in any and all of the 4 zones (on a DB adventure) now only one..apparently
(2) players spend a lot of time getting resources (or using gems) for event items to obtain more generals so they can go though adventures quicker only to have the object of obtaining those generals defeated.
(3) Essential you have forced us to get the pointless 1/4 master as seems they only half decent way to transport large volumes of troops now.