Sonar 2.2 looping always drops out

i have this problem on 2 different pcs, and ive had it in every single
version of sonar that i have owned (from 1.02 upwads). ive written to tech
support and just they said theres a bug and it will be fixed in the next
update, but they told me that *before* the 2.2 update. im just wondering if
this is a common problem - because it seems so incredible that such a basic
process as looping cannnot work properly. does anybody have any tips to
avoid it or workarounds???

thanks

james