E7450/7470 wifi off after removing network cable

Hi everyone, we are having issues with all of our Latitude E7450's and E7470's not reconnecting to wifi after being connected to LAN. The problem occurs when you have been connected to a dock or directly to an ethernet cable, when removing from the dock or unplugging the network cable the wifi adaptor stays off and cannot be turned on via the proset software, the only sollution is to reset the proset software or reboot the laptop.

E7470's are running drivers 18.12.0.0687 as are the 7450's
Has anyone come across this?

Thanks.