Cargo Hold upgrade bug ;C

[supertoinkz]

Well, I tried to make a Berserker upgrade for Goblin Zeppelins
the old unit has 8 cargoes
while the new unit has 10 cargoes

well, all was set (according to Mephestrial's tutorial)
but when I test it ingame, loaded a footman, upgraded the "Cargo Upgrade" and voila

the result made me go wtf, the footman (the one I loaded earlier) dissapeared Oo

So the question is:
1.Are there any solutions?
2.If the answer for above question is no, any other tricks?

 

[M0RT]

What about making the Cargo hold ability with 2 levels? propably won't work though...
You will propably have to replace them with triggers, unloading all the units and loading them again to the new transport

 

[supertoinkz]

The ability level setting works
PERFECT
+rep