Comment 5 for bug 895521

Because of Graion's recently reported #1498 issue, I thought this one needs a bit more explanation (it's late, but I didn't remember about this before).

There are some circumstances that hover and jumpjet units can become cloaked.
Firstly, when they exit a War Factory that was under a cloaking field effect (they uncloak as soon as they leave the cloaking field).
Secondly, they cloak if they somehow land on the ground in the cloaking field (and then normally uncloak if they leave it later).
This means that those units aren't completely prevented from cloaking, but their height above the ground affects it.