Video Starts In Middle Instead of at the Beginning

Same issue here. The video displays on the timeline about 1 minute into the slide. It's not set on a delayed start, but should start as soon as it's on the screen. Both in preview and when published to review360, it displays about half way through the video - and doesn't play every time. If I refresh, then it works. 

It almost sounds like the video doesn't completely load the first time the slide is shown. It reminds me of "preloading" scripts on websites to make sure they are there in the memory when they are needed. I'm wondering if there's a way to preload the videos so they are ready to go when the timeline calls for them. (I did read the article about how things are preloaded, but it doesn't seem to be doing the job - https://articulate.com/support/article/how-content-is-preloaded-in-storyline)

If there is a fix for this that could apply to everyone - it would be great if it was posted here so we don't have to send our files to support and overload you! :)