Videos in Storyline 360 sometimes stop

Hey folks, just wondering if anyone else has run into this issue at any point. I'm getting occasional complaints from users saying that videos I've inserted into a Storyline course (Insert, Video from file) sometimes stop playing. The source files are standard h.264 MP4 files from Premiere.

I've seen this once during testing and I know I didn't click/tap the screen to pause (and in fact, no amount of clicking would make it resume). It almost seems like a buffering issue.

It happened to me today using Chrome on Android. Again, this isn't something that can be easily reproduced, just wondering if I'm not alone.

Thanks for your time!