Sony wh-1000mx5 after receiving phone call on phone, MacOS loses headphone microphone as input

What happens

• My WH-1000 MX5s are connected via bluetooth to my iPhone & MacOS at the same time
  • *Doesn't matter if audio is coming from iPhone or MacOS
• Receive a phone call on phone
  • *I have disabled receiving phone calls on laptop bc of this issue
• Whether I silence / decline the call, headphone volume gets softer to indicate there is a call
• After call decline, MacOS no longer sees WH-1000 MX-5 as microphone input
• To get it back, I have to power off/on headphones

Expected

• Receiving calls does not cause MacOS to lose headphone mic as an input

What I've tried

• Disabled incoming phone calls on MacOS / FaceTime (helps some situations)
• Updated MacOS / headphones to latest software / firmware