Headphone microphone not switching to phone during voice recording on iPhone

When the headphones are half-connected and I want to record a voice message when switching to the phone microphone, it resets and the microphone of the headphones is put anyway

When adding a new function when you can choose what the device or headphones will record sound, I faced the problem that when you change the microphone from headphones to the phone, it does not change, but simply resets, why this can be

[Edited by Moderator]