Mailbox sensor triggers recording late

I just installed a Ring Stickup cam solar and associated it with the Ring mailbox sensor. However, the recording doesn't start until the mailman is already leaving the mailbox. I used to have it associated with the Ring Doorbell Cam, and that didn't happen; that would record as soon as the motion was detected. The stickup cam has a better perspective, so I don't want to switch back to the doorbell cam, but I also don't want someone stealing my mail and leaving before the recording starts. Suggestions?