onBlurContentControl event is not working

I have a basic system plugin which triggers onBlurContentControl event.

(function(window, undefined){
	var flagInit = false;

	window.Asc.plugin.init = function()
    {
		alert('test')
	};

    window.Asc.plugin.onBlurContentControl = function(oPr)
	{
		alert('onblur')
		console.log("event: onBlurContentControl");
	}
		
    window.Asc.plugin.button = function()
    {
    };

})(window, undefined);

I had same issue with the onChangeContentControl event. I had to add this event in config.json file under variations.events = [“onChangeContentControl”]. But even after adding blur event in the config.json like so variations.events = [“onChangeContentControl” , “onBlurContentControl”], it is not working.
OS version: Ubuntu 20.04LTS
App version: DocumentServer v7.3 Community edition

Hello @waghankit

Please try using the event like that:
Window.Asc.plugin.event_onBlurContentControl
Will it work that way?