Player changing size after refresh?

Hi,

I installed jw this morning and everything seems to be working well except one thing. If i play a video and then travel back to my page without restarting the browser it seems to resize the video.

I have it set to 480×270 but once i refresh the page or head back to the same url either by typing it or through a link it seems to set the video to 480×480, thereby covering content that i have underneath. I have tried it in firefox and chrome and it seems to happen in both browsers. The only way to get the video to load in the correct size again is to close the browser and go back to the page with the video.

Anyone have any ideas?

https://wordpress.org/plugins/jw-player-plugin-for-wordpress/