This is a common point of confusion on our Mavrik stands. The stand is actually designed to hold your phone up, not to lean against. The lip on the bottom is just an extra precaution to catch your phone in case your phone gets knocked off the magnet. While the magnet is plenty strong to hold up your phone, we’ve found that those really thick cases decrease the connection significantly. Sounds like this is what’s happening in your case. Thank you for your feedback! We will keep this in mind for future designs.