Calls made through headphones do not record the other person
My phone (OnePlus 3, A3000) can record calls perfectly well when used normally. However, when I plug in my headphones with a microphone integrated into the cable and make a phone call with them in, I can only hear myself on the recording, not the person on the other end. I tried all the different recording sources, to no success.
Here is one such recording, using the Camcorder audio source.
I am using version 1.7.13 on Android version 9.