Storyline - Closed Captions Not Responsive or Properly Positioned on Different Devices

Hello,

I’m using Articulate Storyline 360 (Modern Player) and have added built-in closed captions to the lesson. They look fine on my desktop, but when I view it on other devices or screen resolutions, the captions appear out of place (outside the slide area) and don’t resize responsively.

I couldn’t find any player setting to make the captions scale or reposition automatically depending on the device.

Has anyone found a reliable way to make captions responsive and properly aligned across devices?

Thanks in advance for any suggestions!
Farah.