Some users have experienced combat freeze-up and, occasionally, crash issues. These occur particularly where enemy turns do not proceed or end properly, most commonly in Miel Avest and the Bloom Heart.
One particular item which is also known to cause combat freezes is the Frost Brooch. You may wish to avoid using it currently, as it tends to cause the following combat turn to freeze or get stuck.
This issue should be fixed as of the 1.0.2 patch. You may need to load an earlier save file to benefit from the fix, however.