I live stream four cameras in a group view on average 8-10 hours a day and none of them disconnect. As @dave27 suggested check your router and your connection. You don’t want to toss these cameras and get into the same predicament with the other brand of cameras.
I originally started this thread and it’s been OK until recently. Now it won’t even connect in the browser in Windows. The phone app works OK so nothing is wrong with the camera. I submitted a bug report but there’s nothing else to do.
My web viewer never crashes and I just found it can simultaneously record each camera to PC drive without video length limit (it saves 2 hour videos and runs continuously)
Oops 
Wrong camera system… Reolink’s Web viewer works great