Closed captioning not appearing

So, any reason why closed captioning would appear for some browsers and PCs, but not others?

I have a course with three CC videos. The first one works - I click the icon and there it is. The second and third video used to work, but now when you click the button, no CC. 

I noticed it happening in my Chrome browser and mentioned it to my client. They said they could not see the CC either. But when I talked on the phone with client, he could see it in all browsers he had. Then I checked it on three other computers and on my primary computer's Edge and IE browsers. Works fine. But not in my Chrome, which I updated to Version 69.0.3497.92 (Official Build) (64-bit). 

So I did my usual drill to test for corruption. I put a new copy of the video on a new slide - still no CC in Chrome. I created a new Articulate file and only added the video. Get this - the CC appeared in Chrome, but behind the video (I could see the bottom peaking out). 

Is the CC corrupted or something? Why does it work on other computers and in other browsers? I mean, I'm torn between not being able to reproduce it and saying it's on their end, but I kind of can reproduce it in one environment.

Here's the link to only the video slides - https://360.articulate.com/review/content/c5e5fd3b-579f-4c31-b4f7-bd7c5e015b4a/review 

I see CC everywhere except on Chrome on one particular PC. Any insight would be appreciated.