Sounds playing even if the channel they are on is paused

I have most music tracks in my game separated as an intro (that plays one time) and a loop (that plays infinitely after the intro). At Start of Frame, the intro is played on channel 2 and the loop is played on channel 1, but then paused in the same event line. Then when the sample position of the intro is greater than the duration of the intro minus some value, I resume channel 1.

For some reason, the pause on channel 1 never occurs and both music files play at the same time. I have "Play sound across frames" enabled and control almost all my music by playing them on specific channels. Any ideas?

Has no one run into anything like this? I have all my music as mp3 (since this was an iOS game first). Could that be the problem?

Fernando fixed this issue in the next beta (b286.7), in case anyone else runs into this problem.