8.6_807 unresponsive after idle

I seem to be having a problem with some Wyse 5070 thin clients and the 8.6_807 firmware that we just recently upgraded to. Whenever a user locks or logs out and it goes to sleep, it needs to be manually powered off then back on for the device to display a logon screen. It also shows offline in WMS. Does anyone know of a fix for this? Thanks