MOHELA auto pay hasn’t gone through yet?

I've been paying my loans through MOHELA via auto pay for months and months. My payment is scheduled for today, but still hasn't been withdrawn or posted. Anybody else have this issue? The only other time this happened is when my payment date fell on a weekend. I recently applied for IDR right before thanksgiving, and as far as I know haven't been placed in forbearance. I'm just worried about the auto pay not working and it being late, through no fault of my own.