DAXMD: Selecting a Dimension with UnknownMember results in permanent 25% CPU Usage

Hi,

I'm using the CTP of DAXMD. When I'm selecting a specific Dimension as Filter in Powerview, the the CPU usage inrease to 25 % permanently and I get no results. Only Solution was to restart the whole Server. The Statement looks like :

EVALUATE
  FILTER(KEEPFILTERS(SUMMARIZE(
                                     VALUES('User')
                                     , 'User'[USER AD CD.UniqueName]
                                    , 'User'[USER AD CD]))
   ,NOT(ISBLANK('User'[USER AD CD.UniqueName]))
  ) ORDER BY
  'User'[USER AD CD], 'User'[USER AD CD.UniqueName]

When I remove the 'User'[USER AD CD] from the Order clause all works fine. I realized also that this Dimension has an UnknownMember and the Errorconfiguration set to ConvertToUnknown. When I remove the UnknownMember from the Dimension, it also seems to work.

Did somebody know whether this is only a bug in CTP or not?

thanx