With the new updates it seems that the tab order no longer functions as it use to. I have several slides in a project with layers. It was designed to tab from base layer content to layer content but now it starts tabbing from the beginning of the base layer when it goes to each layer. It did not do this before your most recent updates. Tab order is set correctly to go to the first thing on the layer once the layer opens but instead it goes back to the start of the base layer.
We have also noticed that some of the yellow border boxes are no longer centred on the item being tabbed to. We find on a number of occasions that they are noticeably off centre.