Blurry Images in Preview and Published

Hi Katie, thanks so much for jumping in (and sorry for the slow reply).

The only thing I'm doing with the published Storyline slide is embedding it within Rise, so I don't know whether the problem exists independently of whether it is viewed through Rise, if you see what I mean ... not sure that is very helpful, sorry! I do know that the problem doesn't happen when the slides are previewed within Storyline. 

I have attached an example Storyline file - I've made a mockup as the stuff I'm working on cannot be shared publicly, but since the issues exists with every file it should do the trick of showing the issue! I have also created a dummy course in Rise into which I have imported the file, to show the problem. See here: https://rise.articulate.com/share/jqZOgjP3cvKSwdNSV4WuP01kGxeCgSLd

When this issue first came up about 18 months ago I was able to fix it by changing the image quality to 100% when publishing, but this no longer seems to solve it. However, earlier this year (hard to say exactly when - perhaps January??) it returned and I haven't yet figured out the solution.

Finally, just to add that this issue only seems to present when the Rise course is viewed in Chrome at less than 100% (although further testing may be needed on this). However, Chrome is used by a very large proportion of our audience and screen size (therefore comfortable viewing magnification) varies significantly, so we really do want to find a fix. 

Thank you so much in advance :)