Headphones not being recognised?

Headphones have been working fine so far until i decided to unplug them to use elsewhere. Upon plugging them back in, they were seemingly unrecognised? I saw no indication that the OS was picking them up. They started to work again after a system update but after restarting they have now stopped working again…

Anyone got any ideas?

How are you connecting them. 3.5mm jack or is this one of those usb connection types?

I’ve tried using separate connectors (pink and green) for headphones and mic and also tried one connector for both but both using 3.5mm headphone jacks yes