DCM ad clickTags opening blank tabs in FF and IE

[Kiere]

I am having an new issue with previously fully tested live banner ads made with GSAP that now are opening two blank tabs in FF and IE. I am thinking this is a DCM backend thing but I was wondering if anyone has found a fix or is having the same issue?

DCM recommended changing clickTags to href="javascript:void(window.open(window.clickTag3))" instead of using the standard href="javascript:window.open(window.clickTag3)" and I am still getting the same problem. 

 

Any thoughts?

 

[Oliver16Years]

	"DOUBLECLICKSTUDIO": {
		"scripts": "SCRIPTS_CDN",
		"assets": "ASSETS_ROOT",
		"kilobytelimit": 200,
		"zip": true,
		"fallback": true,
		"landingpage": true,
		"engine": "<script src=\"https://s0.2mdn.net/ads/studio/Enabler.js\"></script>\r\n",
		"clicktag": "\t<div id='clickTag-exit' style='position: absolute; cursor: pointer; top: 0; left: 0; width: 100%; height: 100%;'></div>",
		"clicktagid": "clickTag-exit",
		"postscript": "DOUBLECLICKSTUDIO@postScript.js"
	},

	"DOUBLECLICK": {
		"scripts": "SCRIPTS_CDN",
		"assets": "ASSETS_AUTOINLINE",
		"kilobytelimit": 200,
		"zip": true,
		"fallback": true,
		"separateFallback": true,
		"landingpage": true,
		"engine": "<script> var clickTag = '{{landingpage}}';</script>\r\n",
		"clicktag": "\t<a id = clickArea href = 'javascript:window.open(window.clickTag)' class = System ></a>",
		"clicktagid": "clickArea"
	},

this is the last working adFormats.json of mine