Modal Timer interval has no effect

Coding Python Support
1

I set up a modal timer, but the interval value doesn’t seem to change how often the timer fires.
Am I doing something wrong?

Here is the code:

class ModalTimerOperator5(bpy.types.Operator):
    """Operator which runs its self from a timer"""
    bl_idname = "wm.modal_update_panel"
    bl_label = "Timer-5"


    done_once = False
    _timer = None
        
    
    def modal(self, context, event):
        print ('timer')
           
        return {'PASS_THROUGH'}




    def execute(self, context):
        wm = context.window_manager
        
        self._timer = wm.event_timer_add(1.0, context.window)     # Interval not working.
        wm.modal_handler_add(self)
        return {'RUNNING_MODAL'}
        


    def cancel(self, context):
        ModalTimerOperator5.done_once = False
        ModalTimerOperator5.timer_cycles = 0
        context.window_manager.event_timer_remove(self._timer)


        return {'CANCELLED'}