Unless you have a really old iPad that still had a 3mm socket, there must be an 'adaptor' plugged in to the usb-c port of the ipad and then provides a 3mm jack for the aux cable. If you do have one of these adaptors, that is where I would suspect the problem to be. That little component contains quite a bit of electronics to convert the digital signal from the ipad to an analog signal that transmits in the aux cable to the amplifier. It does have the capabilities to do all those things you mentioned if it is not functioning correctly. My recommendation would be to get an apple official one and try that.
If you do have a really old iPad that had the 3mm jack, then I would suspect something faulty in the iPad itself as it would have the digital to analog converter built in and it could fail same as the exterior one.
And yes, heat could make that converter either internal to the iPad or external misbehave.
If you do have a really old iPad that had the 3mm jack, then I would suspect something faulty in the iPad itself as it would have the digital to analog converter built in and it could fail same as the exterior one.
And yes, heat could make that converter either internal to the iPad or external misbehave.