Printspooler not connecting all printers at logon

Hey guys

[basics]
We have a VMware VDI environment running on Windows 7, and we are now experiencing a strange printing issue.
The user connect to the farm using a Thin/Zeroclients.
All printers are network printers and shared by a single Windows Server 2008 R2 print server.

[the issue]
The user logs in but only has a couple of the printers he had connected last time.
When you look at the registry, you can still see all printers.
When you try to connect the missing printer you immediately get an error (0x0000000a).

[the workaround]
I figured out that i can restart the printspooler service to workaround the issue.
It seems that after doing so the printers are visible again on the "devices and printer" overview.
And it is again possible to connect new printers.

So it seems that there is some issue with the printspooler service at logon.
Eventlog does not show anything usable about a printing issue.


Has anyone of you seens something like that or has some ideas how to troubleshoot?

kind regards
Simon