My Eufy doorbell camera has been acting weird recently. It went offline. I tried to re-start the router as Eufy suggested but it did not work. I then plugged in the power chord and the camera came back online. However, once placed at the door for a couple of days, it went offline again. Back in to be plugged in the power chord and it came back online right way. The battery is actually full as I just charged it but this weird thing keeps happening. Any suggestions?