Comping Multi-Tracks and Audio Drop-Outs

Had to troubleshoot this for a bit to realize, but when Recording in Comping mode, if I'm recording multiple tracks (ex. 20 tracks), I cannot Comp record more than one take (Take Lanes) or I received Audio Drop-outs. For example, I cannot set up a project as a song, and have a band track multiple takes of that song in one project. After the first take, any subsequent takes will fail, due to Audio Dropouts, or a "disk full" error.
 
Now, my understanding of comping mode is that any previous takes are muted. However, I'm guessing the previous take lanes are still played to the I/O buffers, or somehow processed in Sonar, anyway.
 
Question 1: Is this a known limitation, and if so, without divulging too much information, is there a known plan to make this work better in the future with more tracks armed?

Question 2: Is this something that has a known workaround?
 
Thanks!

You could try increasing your disk buffer and/or audio buffer?
Is your disk very full or fragmented?

For what it's worth, I've done comp recording with 12 to 14 tracks many times (mainly for drums). So it isn't a limitation in SONAR.