Issues after latest update (Feb 20, 2024) - Storyline behaving strangely

Yep also having problems with focus order... amongst other things I'm having these issues:

• It starts reading in the middle of the body text on layers - completely skipping the heading (this was a serious issue a few years ago which seems to have been revived recently).
• As far as I can tell, it seems to be reading in timeline order rather than what is defined on custom focus order.
• when you close layers, it skips backwards an element or two on the base layer, sometimes to the middle of a previously read paragraph. This happens randomly. It occasionally also says 'unknown' when closing a layer.
• If none of the elements in the focus order start at the beginning of the timeline (e.g. if they appear half a second after an ignored element) the screen reader skips all the elements. I think this behaviour is confined to layers. 
• On some slides it will read the alt text for the selected state while displaying the visited state.

Have we found any sort of fix or do we know what is the most recent stable version of SL where focus order works properly? I've spent way too much time trying to find work arounds already...