Audition won't stop crashing when I record

Trying to record a voice over in multitrack.  Using a condenser mic through Motu Audtio Express.  For 2 weeks AA has crashed constantly. Crashes when I hit record, hit spacebar to stop, selct output for my headphones.  You name it.  
Have re-installed multiple times.  Ran update today.  Was on phone with Adobe support a week ago.  They remote into my machine and said it was the audio interface.  I was using an adapter to plug into the USB type C.  I thought that might be the issue. Got a type b to type c USB 2 cable to run direct.  Issue persists.  

I have isolated the problem to Adobe Audition.  Using the same settings and hardware I have successfully rcpordeed to Reaper, Audacity, and Garage Band multiple times without crashing.  The only software that won't work is Audition.  Audition does work using the built in speakers and mic, but that does me no good.  Why are other softwares not having thsi problem?  Please help. 

Hardware:

Mac Book Pro 13"

Quad-Core Intel Core i5

Processor Speed: 2 GHz

Catalaina 10.15.7

I am reluctant to update to Big Sur to try fixing a problem. 

Audio Interface:

MOTU Audio Express