iMac / OSX Lion 10.7.5 (11G63) / iReal Pro Version 6.0.1 (7345)
When the time signature is 2/4, the drums drop out after a few bars, come back in out of sync, drop out again.
Edit: This happens during the 2nd cycle, after the "Double Time" kicks in.
O Christmas Tree (C) - Traditional
Tried it on 4/4 and 3/4 without a problem.
