It's the wav sync styles that drive be buggy. What good are having terrific sounding styles if you can't adjust the tempo to suit YOUR specific song needs?
I don't remember all of them, but there are three swing styles that lock me out at tempos that are simply too fast for many songs. Fast swing and Medium Fox, I believe are two of them. They kick in at 140 and 160.
There are others as well, and it really kills a performance when you change tempo smack in the middle of a song without warning. I'd rather have a simpler, slightly LESS stunning pattern that allows me the freedom to use it anywhere. Most of the instrument is like this, and still sounds great. It must be possible..... somehow.