The word "ring" is blinking blue at the bottom of the wireless plug-in chime. The rapid blinking continues day after day. The chime is connected to two Ring Pro doorbells, and each doorbell properly rings the chime. If I unplug the chime, and replug it in, the word "ring" changes from blinking to solid blue. But after a day or so, it is blinking once again. Should this be blinking? Should something be done so that the illumination is only continuous blue?