Kreg is right. It's normal. Annoying, but normal. haha.
My 2015 JK is a manual, and I'm running a Compustar FT7000AS. When I idle with the parking brake set and take my foot off the regular brake, it tries to go into Reservation Mode. The parking lights flash and the siren chirps. After a few seconds it chirps again and lights flash.
If the clicking annoys you too much you can change the Reservation Mode setting in option 1-06 to FO2. See below. Once changed, you'll have to use the fob to activate Reservation Mode.
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1-06 Reservation Mode: Optional manual transmission reservation mode procedures.
FO1 - Locks before set: (default) this option will lock the doors before the vehicle engine shuts
down to complete reservation mode. This procedure is much safer ensuring that the vehicle cannot be
shifted into gear after the engine shuts down and before or during the door locking procedure.
FO2 - Activate reservation mode using RF remote: This procedure is designed to give
the user more control over when reservation mode is initiated. (Default is any time the e-brake
is set reservation mode will engage). Once the e-brake is set the user must hold the start button
on the remote for 2.5 seconds before reservation mode will engage. Once engaged, reservation
mode will operate normally. Note: this procedure is strongly recommended for manual
transmission Push To Start (PTS) vehicles.
FO3 - Reservation sets 10 seconds after last zone is closed: This option will allow the user
to open any zone (that is connected to the CM7) within 10 seconds and extend the reservation mode
procedure time until 10 seconds after all zones are closed. If the user wishes to complete reservation
mode before the 10 second window is up they can arm or lock the CM7 using any means available.
Note: this procedure is NOT recommended for Push to Start vehicles (PTS)
Note 2: this is the only reservation mode option that will allow the user to complete
reservation mode using the arm/lock command. All other options will cancel
reservation mode with the arm/lock command.