Dell Wyse connected to touch screen - keyboard not appearing

We have 10 Wyse 5010 (Dx0D) running Windows embedded 8 standard 64 connected to touch screen monitors.

We manage them via the Dell Wyse Device Manager 5.5. I push a simple device configuration which puts the device into appliance mode and launches an remote desktop connection. 

When the device connects to RDP, the user taps in the credentials box but the touch screen keyboard does not pop up.

Everything has been working fine up until today. Any ideas how to resolve this?

Also when the Wyse unit is rebooted, the configuration disappears and I have to push from WDM. Is this normal behavior?

Any help much appreciated.