Missing information in the traveler.nsf log

We have several users were we miss the information about device type an OS in the traveler.nsf database.

The intersting thing:

  1. It’s only Nokia devices

  2. They had displayed it before (E72, E51 etc.)

  3. It seems that the number of devices not displaying it is growing

  4. Inside the document the Device-ID is read IMEI:xxxxx … that’s why I’m sure it’s only Nokias but the above mentioned information is missing there too

Anybody know about this issue?