Google announced they have begun rolling out support for what is called parallel tracking. In short, the user who clicks on the ad goes directly to your landing page, bypassing the redirects of the tracking URLs, but the browser does send the tracking details, behind the scenes, to the ad platform.
Google explains it as “users will head immediately to your landing page after clicking your ad while their browser processes URL tracking requests in the background.”
Google will default to this method by “early 2018” so make sure your system supports it. “If you use a third-party provider, you should reach out to them as soon as possible to make sure your clicks will continue to be measured with parallel tracking,” Google wrote.
Forum discussion at Google+.