We have heard of users experiencing issues connecting is if there is significant wireless interference or competing WiFi networks. Unfortunately, WiFi routers operate on a narrow band of wireless frequency, typically in 2.4 GHz and 5 GHz ranges. However, within those frequencies are various channels, usually around 11 available in each frequency range. What that means is that if there is another WiFi router nearby and on the same channel, your network may experience significant performance degradation. This is because each device must try to filter out the "noise" on the channel resulting in dropped packets. Think of it like putting messages in a bottle and tossing them into the ocean hoping the information makes it to the destination.
We've also found that some digital wireless microphone solutions work by compromising most all other network traffic. Digital mixers with their own WiFi base station can also further complicate matters.
We recommend checking if there are other WiFi networks that may be active and competing. We find that some users have issues when moving to different venues, or when more audience members arrive as cell phones and WiFi hotspots can also degrade performance on stage. There are utilities that can review the wireless spectrum and see if there are open channels available on WiFi. Most modern routers try to automatically pick an available channel, but sometimes you may need to set the channel manually in your router settings.
You can also look into connecting directly between devices using Ethernet if needed as that would avoid any issues with wireless interference.