Is your router a modem/router combo that came from your ISP? If so, are you using the wifi from it or a separate router?I see the link rate in the web interface for my access point. I have tested with Guarding Vision and when the link rate drops down the video feed either hangs if I was viewing at the time or I cannot connect again until it improves. Also, in Blue Iris the signal will disconnect.
The reason I ask is I've had multiple issues with those frequently dropping wifi devices. The one I use at my home would drop my Hik 2432 cube camera multiple times a day. To resolve I put another router in front of it and used the wifi off of it and used the ISP router as a modem only.