Export Cutting Off part of first measure

I never had this problem in X1 or even way back when I used Music Creator, but whenever I try to export a mix the first few notes are always missing. I've read threads where people have issues with MIDI missing at the beginning of a song, but never audio. I suppose I can simply start the song at measure 2 to avoid this issue but are there other workarounds? As much as I've enjoyed working with X2, I'm a little surprised such a basic feature has this issue.

Export works on the selected region.. If you do not select the first measure it will not be included. Try control a before exporting.

I've seen this behavior, too. I had a song that began at zero after replacing my usual 2-measure count-in with a drum intro. The first hit would start playing a couple milliseconds in. I tried to work around it by pasting a hit from elsewhere in the drum track, but no matter what I put there that first note came out distorted.
 
My solution: I nudged that first hit back by a few milliseconds, not enough to notice the timing error but enough to overcome whatever bug causes it to be truncated. Experiments showed that the amount of time needed to avoid the issue was about equal to one buffer-full of data, e.g. 12ms for a 512-sample buffer @ 44.1KHz.
 
Nowadays I routinely leave a 4-measure lead-in of silence, just in case I want to insert something there later.