Microphone Issue in iPhone 11 with iOS 15.2.1
My iPhone 11 was recently having microphone issues like not responding on calls put on speakerphone, not working intermittently in voice memos, WhatsApp calls etc. I sent it to Apple Service and it came back yesterday quoting that the issue had been resolved. I noticed that the iOS was rolled back to from 15.2.1 to 15.2. I had to upgrade it back to that latest version to be able to restore the backup I had on my Mac. Now, this morning the mic has started malfunctioning again. Please help.
Are there any known bugs in iOS 15 causing microphone issues?