This is my first year as an amputee.
I'm hunting ground blinds and I'm not seeing the deer as when I'm in a tree stand.
I'm using the same theory and cameras.
Without knowing your blind setup, if you are in the same area where you had been seeing deer from a tree, and you are still seeing them on your trail cameras, then my guess is that your ground blind is located up wind from where the deer are passing through. They are catching your scent.
If you are watching a field, or a deer trail, your blind needs to be on the predominate down wind side.
Oh, another possibility is that something about your blind is spooking them.