Browser: Chrome Version 64.0.3282.140 (Official Build) (64-bit)
OS: Mac High Sierra 10.13.3

What steps will reproduce the problem?
(1) Open a Chrome window in separate desktops on Mac. One window per desktop
(2) type businessinsider.com in the left desktop chrome window browser, hit Enter
(3) switch to and type latims.com in the right desktop browser, chrome window, hit Enter

What is the expected result?
Chrome browser should stay focused on whichever tab you're looking at, while the sites load independently in the background. this was the behavior until 2-3 days ago

What happens instead?
For example: If I'm in the right-hand side desktop, looking at the LA Times browser as it starts to load, I'm suddenly yanked to the businessinsider.com tab in the left-desktop browser window when it's finished loading. Then I'm yanked back to the right-desktop LA Times.com browser window when the LA times has finished loading. Not touching keyboard at all after typing the URLs and hitting Enter; Chrome or Mac is auto-yanking to the newly-loaded pages. 

This behavior gets especially terrible when 
(a) opening two Chrome accounts from scratch, one account per window per desktop. Chrome ping-pongs between account windows as the "open by default" pages load, and can't do anything for 30+ seconds until all pages have loaded. 

(b) streaming video or display ads loading on a site like Forbes.com. I get continually yanked every 3-5 seconds away from what I'm working in the right-side desktop to the left-side desktop. 

Would hugely appreciate quick fix, as this is v disruptive to workflow, and is a regression that appeared about 2-3 days ago