Video controls not seeking/scrubbing?

Hi there, 

My team is working on a few different storyfiles for a client, and I'm having a unique issue that my colleagues are not experiencing with the video controls on all my video slides. When I preview my course or publish it to Articulate Review, the video plays and pauses as it should, but I cannot seek or scrub at all. 

I updated Storyline before beginning this project last week, and am running version v3.37.21453.0. This is happening across all new storyfiles I create, every time I open them, but only seems to be happening on my computer. My coworkers have not updated their apps to the newest version yet, so we are wondering if it's an issue with the update.

I've attached a test storyfile that is showing the same issue for me with a different, shortened mp4 on an otherwise blank slide. If I send a storyfile to my colleagues, they are able to scrub when previewing in Storyline or publishing to Articulate Review on their computers, but if I publish a course to Articulate Review and provide them the link, they are not able to scrub. 

Note that if I press play while on the slide (not in preview), scrubbing DOES work.

We're hoping that once the project is finished, I can send it to a colleague who will then publish the file on their machine and we won't have issues with scrubbing in the published version, but I'd like to see if this can be resolved if possible, in case others are experiencing the same issue.

Unfortunately, since this is a client project, I cannot use the player seekbar as a workaround, as they want the classic player with all player features disabled. The issue is with the video controls that I have set to appear below the video on all video slides in the course.

Any help is greatly appreciated!