I have a Moto G 5 Plus (India) which got an OTA update to Oreo 8.1
I use a pair of regular headphones (without a microphone), with my phone.
Before the update, I could easily take a call, and I would hear via the headphones, and the phone's mic would pick up my voice. This worked great with the stock dialer, whatsapp calls as well as Skype.
After the oreo update, the phone no longer registers any sound from the mic if a headphone is connected.
How do I go back to the original behaviour?