Thanks for the information Colleen,
I suspect this answer is applicable for GRC 10.X system. We currently use GRC 5.3 which is fundamentally different than GRC 10.X (GRC 5.3 is Java -based) and GRC 10.X is a complete rewrite, returning to ABAP stack).
So it is quite possible that this not occur in GRC 5.3, (If i recall correctly, we even had to activate it when using GRC 5.3, to ensure smooth operation of user provisioning process, with RAR simulation, in order to avoid timeouts)
But we are planning to upgrade to 10.1 in the near future, so we should definitely look into this issue. So you link definitely helps.