By default, all Audition temp files are located in a directory that the OS created, and has a significant degree of control over. What we recommend for temp files is that ideally they should be on a drive of their own (a usb one is fine), and that an SSD is best. It's easy to alter the location from Edit>Preferences>Media and Disk Cache. The other thing you should probably do (if it isn't set to this already) is go to the Data section and set the Maximum number of concurrent file processes to 2, or even 1. This can often make things progress faster and more accurately than a higher setting.
However you look at it, you have to try all this first before we could even consider calling it a 'bug' and escalating it. I should emphasise though that these are forum suggestions, not 'official' Adobe ones- although they've never argued with them. FWIW we have suggestions for making Noise Reduction work rather better than any instructions they issue as well - and they haven't argued with those either... mainly because they work!