Yes, this is related to supervision and according to Qolsys this is due to how the translator is learned in via the tamper terminals. If the terminals are shorted again after installation, you will need a jumper in between the tamper terminals.
In this case it is recommended to use a normal short piece of wire (zero resistance effectively).
Do you already have a jumper wire between the terminals? If so, power cycle the translator, does that resolve the issue? And does the issue return after a period of time?