I havent bothered to search the forums to see if anyone else has posted this, and if you haven't already experienced this bug you'll know to avoid it afterward, either way its needs to be fixed.

Incapacitate and Lost Hope bug out on hillside fights, even more than they do on flat land, where the rouge cannot use any of the melee abilities on the target. Happens sometimes too when you're hitting someone on a mount.

I cannot tell whether its lag or the target just goes invisible after incap/lost hope fade, although I've seen it enough to rule out that its actually lag. My targets end up (still on the mount) 20 ft away from where I used the abilities.