Soundcard inputs not detected

I find myself switching between audio drivers fairly regularly in Cubase, and today when I went to switch from my headphones to my soundcard speakers (this is also how I record, as I cannot use my soundcard inputs when using front panel audio headphones) I found that the outward connections of the ASIO driver I was using were connected, but my inputs show up as “Not Connected 1/2” under Port System Name, and there’s no signal being put through to Cubase, despite the soundcard picking it up fine. Any ideas?