Camera going offline multiple times a day

I don’t know why but my camera keeps going offline. It’s on battery. Charged anywhere from 30-99% when this has happened. Wifi setup is literally on the other side of the door the camera is on. This isn’t helpful as every time this happens I have to remove the camera from the door, hold the button down and go through the whole reset process. It’s hardly security when this happens day and night. I also don’t seem to get any notification of it. I only notice when I open the app to check on my house. If it’s offline when I’m not home, I have nothing watching my house until I get home and set it up all over again. Help?