Problems with Windows PowerSafe Mode

I've noticed what could potentially be a problem with the cifx cards. When the puter goes into sleep or powersave mode, the card goes from green LED to orange, and if you look in the setup utility, it now thinks its Device Number is 4294967295, its serial number is also 4294967295, its base address changes from 0xE0100000 to 0xE01F0000, and the path to the assigned firmware reads "C:\Program Files\cifX Device Driver\4294967295_4294967295\channel0\cifxdpm.nxm" Obviously it no longer works when this occurs. Reloading the firmware seems to solve the problem, as does rebooting, but then the firmware needs to be reloaded again anyway. The board I'm using now to duplicate the gripe is a cifx50E-DP/ML, but I have experienced it on the non-PCIe cards and profinet cards as well. I don't know if this is an issue to worry about, or if it can even be fixed, but if we have customers who want to sleep their systems every once in a while, it's going to be an issue for them.