Screen Reader accessing layers that aren't active

Hi BryanVarner this is a Storyline bug and will hopefully be fixed quickly, as it is a serious accessibility bug. The table element should behave as all other elements do. I'm not sure why it is missing the aria-hidden attribute. 

A hotfix solution for this would require JavaScript. I might be able to help you out if you are potentially delivering this before a proper fix comes through.

If you are interested, here's some script.

Add this to the main timeline and execute JavaScript on timeline start:

rmLocalHideTable = function(hidden, attempt)
{
	let tries = attempt || 0;
	const observations = document.querySelector('table[aria-label="Table with 3 columns and 12 rows"]');
	// table not found, try again
	if(observations === null) {
		if(tries !== 10) {
			tries += 1;
			setTimeout(function(){ rmLocalHideTable(hidden, tries); },100);
		}
	}else{
		// table found, set aria-hidden attribute
		observations.setAttribute('aria-hidden',hidden);
	}
}
window.rmHideTable = function(hidden, attempt)
{
	// add delay before running to ensure any 
	// conflicting scripts have time to run first
	setTimeout(function(){ rmLocalHideTable(hidden, attempt); },500);
}

You can then call the following JavaScript functions to show/hide the table for screen readers:

Whenever the Data & Observations Layer layer opens, run this function:

// Make available for screen readers
window.rmHideTable(false);

Whenever the Data & Observations Layer layer is hidden, run this function:

// Hide from screen readers
window.rmHideTable(true);

I have added to your file as an example.