Seems like something related to TCC. If you want to reset the permissions, you can open terminal and run "tccutil reset All"

which will reset all the privacy access for your apps. 

You can also run tccutil reset Microphone if you just want to reset microphone access. 

More details can be found here: https://www.google.com/amp/s/eclecticlight.co/2020/01/28/a-guide-to-catalinas-privacy-protection-4-tccutil/amp/

Hope this helps!