Mailbox Sensor only shows Stopped detecting motion

About a week ago I stopped receiving notifications from my mailbox sensor. When checking Event History in the app (on either of my two devices that have the Ring App installed) the sensor ONLY shows the "Stopped detecting motion". It basically shows the Stopped Detecting Motion events as reliably as it always has, but the "Motion Detected" events are not showing.This causes no notification to trigger, because only the "motion detected" will trigger it. So I can see when the door has been open, but only by manually opening the app and checking the main dashboard, where I added the mailbox sensor activity widget underneath the "Disarmed", Home, and Away buttons, or by going into the event notification.So the device is clearly detecting movement but not sending the initial motion detected information, or the Ring Bridge isn't. I took the batteries out and put them back in, which didn't fix anything.I then removed the device from the Ring system through the app, then readded it and I get the same problem. I also unplugged the Ring Bridge and plugged it back in. This also did not change anything.I searched online and don't see anyone experience the same problem.Does anyone have any ideas for resetting this so it can start registering the movement again?