OBS not recording microphone

[MeatyCrow]

I've been trying to get OBS to record on separate tracks - Windows audio and microphone. No matter what I try, it only seems to be recording the Windows audio, but never the microphone. The microphone is functional and OBS sees it, I can see the volume being displayed in OBS.

Edit: It does seem to work when recording both the microphone and Windows audio on the same track