I got a case type with 2 stages.
The first stage collect information
The second stage is an assignement with an SLA on it, then an utility to restart this stage (pxRestartStage)
We run an activity with ResumeFlow before the SLA's deadline.
So the case advance then makes a restartStage. This works once but
when trying to resumeFlow again, an issue occurs :
Instance of class Queue not found: SYSTEM-QUEUE-SERVICELEVEL.SYSTEM-QUEUE-SERVICELEVEL 1607587388230000B2ABB40877727B78296E6955306CD713