I use clipless on my road bike and have no numb foot issues. I don't on my hybrid, don't want to, but have had issues on that bike with numb foot. Some shoes are worse than other shoes. Oddly, it doesn't seem to correlate with the stiffness of the shoes. I can ride 20 miles in Crocs and have no problem. But I also can ride for miles in my Keen bike sandals, which are very stiff and actually are made to take cleats and used with clipless, also with no problems. Running shoes/tennis shoes, a big problem. So who knows. I found shoes that work so I am happy.

Maybe first try a different pair of shoes?