Just happened that one of my four stick up battery cams did the exact same thing descibed.
I started at this morning and thats the last heath check. like poster rssi says good at -55 and online but no live veiw and motion since it started and there has bee plenty. all other cams still working so it is not my network and all four worked fine till this. like poster i have no idea why we cant do a remote reset since i read support can do that. I will go out in little to get the came and reset it.