im having the same problem.
Started playing dai again a few days ago and my main (dual wield rogue) freezes a lot.
It starts working again when i do a ability like twin fangs. Havent tried jump yet 8)
Didnt notice others freeze yet.
During the first tutorial part of the game where you fight the first demon my
main char froze constantly, wich wasnt a plesant experience 😎
If this keeps happening, i'l probably wait for a patch before i go any further.
Was thinking about buying the expensions, but with this bug in the game
i dont think i will.
Edit:
can confirm it happens to the controled character.
exiting tactics screen and either jumping or using a ability will get the char unstuck
edit 3-9-2015:
It happens in tactics mode only as far as i can see.
it happens to all characters in the party, not just the controled one, and even mages get frozen.
the end fight with this tevinter magister guy to get the mages support was realy funny this way (NOT)
since i do all fights in tactics mode i would call this a MAJOR bug