One example includes hiding the 'main menu' button (a custom player button that links to a menu landing page) at the beginning of a course; which forces users to read certain content before they gain access to the rest of the course.
Another example is hiding the seekbar on slides where there is no audio on the base layer, but there is audio on other layers (navigating to an audio layer toggles the seekbar on again).
Also, it appears that the left-hand panel, where the in-built player tabs are usually displayed ('menu', 'resources', 'glossary' etc.) appears, even when none of the tabs are selected for that slide. This is frustrating, as it makes it look like there is an error - the user can just see an empty panel; whereas the panel should not be there at all.
Any assistance with these issues would be appreciated - I'm on a tight timeline, and it's been a frustrating blow to discover that what has been working for a long time, is now suddenly not working.