Unit Dissapear

[Varosch]

Hello.
on the Humanquest where i need to siege Ral Nistro 2 of my lvl 25 elite units just dissapeared in a skirmish between the 1 and 2 wall segment they didnt die they just dissapeared from 1 to the other second.

hope you can help me

[GPS51]

Were they on a wall that was destroyed? Units on a wall that is destroyed are killed.

[Varosch]

between the segments not on them^^ ahd my 6 man army all time in check