Grey bars on player in preview scene and published output
I'm having a problem with a Storyline 2 project which displays grey bars on both sides of the player in certain circumstances. The project has 2 scenes, a tutorial and an assessment which uses a randomised question bank. The player displays correctly in the tutorial scene (when previewing individual slides and the whole scene). For the assessment, each individual slide, intro, each question and results slide, show the player correctly when previewed individually but when the scene is previewed I get grey bars on both sides of the player. I've checked all the slide properties and they are all set the same.
Thanks in advance.