Checkbox suddenly showing anomality

I have used this code for my checkboxes for years in contact form 7

Examples:

   [checkbox checkbox-ac use_label_element exclusive "A/C Service, "]
   [checkbox checkbox-alignment use_label_element exclusive "Alignment, "]
[checkbox checkbox-batteries use_label_element exclusive "Batteries, "]

Message Body:

Services requested:
[checkbox-ac][checkbox-alignment][checkbox-batteries][checkbox-BGservices][checkbox-brakes][checkbox-coolingsystem][checkbox-electricalSystem][checkbox-engineperformancediagnosis][checkbox-engineRepair][checkbox-exhaustRepair][checkbox-LiftKists][checkbox-offRoad][checkbox-offRoadAccessories][checkbox-oilChange][checkbox-performanceModifications][checkbox-steeringSuspension][checkbox-suspensionLifts][checkbox-vehicleInspection][checkbox-tires][checkbox-transmissionServiceRepair][checkbox-vehicleMaintenance][checkbox-factoryScheduledMaintenance][checkbox-prepurchasedVehicleInspections][checkbox-serviceWarranty][checkbox-other]

If any of the checkboxes were selected, only that label would show. Now the label of the selected checkboxes along with all the other check box names show up in the sent emails:

Services requested:
A/C Service,[checkbox-alignment][checkbox-batteries][checkbox-BGservices][checkbox-brakes][checkbox-coolingsystem][checkbox-electricalSystem][checkbox-engineperformancediagnosis][checkbox-engineRepair][checkbox-exhaustRepair][checkbox-LiftKists][checkbox-offRoad][checkbox-offRoadAccessories][checkbox-oilChange][checkbox-performanceModifications][checkbox-steeringSuspension][checkbox-suspensionLifts][checkbox-vehicleInspection][checkbox-tires][checkbox-transmissionServiceRepair][checkbox-vehicleMaintenance][checkbox-factoryScheduledMaintenance][checkbox-prepurchasedVehicleInspections][checkbox-serviceWarranty][checkbox-other]

Why this sudden issue? I have not changed anything!

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