iOS 10 using WiFi Networks without Internet Access

I work in the live entertainment industry where we often use iPads etc. for wireless remote control of equipment and devices. On these "adhoc" wireless networks, we most often do not want to connect our access points or wireless routers to internet access. Up until the release of iOS 10, this has not been a problem for connection because we just connect the iPad to the network using a static IP in the subnet range of our console, projector, or other device. Since installing iOS 10.0.2, this way of connecting to the network is no longer working. When trying to connect to the network we now get an "!" on the network connection and we are unable to access our devices directly.

Is there a way to force the iPad onto a WiFi network that intentionally does not have internet access without having to setup a client portal on the access point or router?