Audio switches from headphones to speaker
New iPhone 12 with latest iOS. Wired headphones with Apple connector (yep it's clean :)
After inserting the headphone (the headphone icon shows in the right pull down menu) I then try to use apps such as BBC Sounds, iPlayer, and YouTube... But as soon as I press play, the headphone icon changes to a speaker and audio is routed to the speaker.
I then have to pull out the headphone and reinsert for the audio to remain playing via the headphone.
This is extremely annoying at times when I don't wish to cause a nuisance.
I've recently switched from Android, and this is a deal breaker for me... I've tried everything I can think of, and searched for answers.
Grateful if someone could give any ideas to fix otherwise I'll assume it's a faulty phobe.