Spotlight camera connection issue!

Hello everyone, I have been having issue with my battery Spotlight camera that is in the front of my house by the garage. I can't get the live view to work consistently. My internet service is working fine because I have a 2nd spotlight camera at my back door and Ring doorbell pro camera at the front door (same distance as my garage spotlight camera) that works flawlessly. I contacted customer support and they couldn't figure it out either and sent me a replacement and it's the same issue. I had my internet provider come out and move the modem/router closer to the garage (tech area) and still no luck. I've tried all the different ways like: resetting the modem/router, removing the camera from the app and reinstalling it, tried it with a wifi extender, and trying it with my cell service versus wifi signal. Pretty much everything I can think of and I hope maybe there's a trick I don't know about. Please help!