I have same camera without repeater but connected to remote LTE router too - in my case is huewai b535-333. Camera drop any connection to self but still working - how I checked it? I have second camera, trackmix wifi, that run smoothly at same time and if it is night, I can see infrared from hanged camera (so it's working). Latest firmware too. It should be something with newest firmware because before update camera works fine.