I find this problem all over the internet but no one has a solution yet. My mic is not being picked up by PNGtuber Plus, even though it's clearly working on the rest of my PC. It has done this before. The only way I was able to get it to work was to have a speaker plugged in or Bluetooth'd to my PC at the same time. For obvious reasons, I need it to work with my headphones, not my speaker. 
I was able to repeat the problem twice with different microphones. 

Would love to hear a solution to this problem. I've tried rebooting, rebooting the app, switching the order of what turns on or plugs in first. There does not seem to be a pattern. Please help.Using  Windows11,