Audition CC 2019 does not seem to support multicore rendering

I sometimes mix music with AU CC2019 on my laptop equipped with intel Core i7-9750H (6 cores, 12 threads). However when I'm running or rendering my project (mainly using third-party VST plugins) , only one of the cores (threads) works. It seems that other 5 cores (11 threads) are wasted. When I mix my songs with the build-in effects，maybe one more thread works. But I cannot be satisfied under this circumstances. 

I know that Adobe Pr is able to implement multicore rendering. Can Audition be implemented as well?