Having the same issue on windows 10 earphones work fine when plugged in without the splitter however when I connect through the splitter so I can use the mic I loose the audio to the left ear and the mic dosent work
I have them set up as a headphones on the green jack and a mic on the orange through my motherboards audio software such is MSI
When I go into the properties of the mic there alot of noise coming through greens maxed out wich suggest to me that it's still trying to force output the other ears audio through the mic
If anyone knows of any fixes would love to hear