iPad 4 sound problem

Hi guys,

As of late I've encountered a problem with my iPad 4.

When I plug in earphones the sound only works when I turn the volume up to max. When I start turning the volume down, the sound stops working and I only hear distant crackling noises. I've tried several earplugs and also headphones so it's not that.

Also the speaker works fine.

Anyone knows what the problem is here? And how to fix it?

Help is very much appreciated,

Kind Regards,

Rick

iOS Version: 10.3.3