Tab Order: Storyline skipping first object on non-base layers?

Hi.

I'm having a similar issue...

Tabbing works on the base layer, but then when I press Enter on an object to show a layer, the tabbing starts cycling through objects on the base layer again and I can't tab through content on the layer.

I've discovered that the default tab order puts the content of the layers first in the running order, and the content of the base layer last. Then I get the problem above. If however, I move the base layer objects to the top of the tab order list, I don't get this problem. But this creates a huge amount of work, when you have multiple layers with lots of content. Each base layer object has to be moved individually all the way to the top using the up arrow.

If this is needed to ensure layers tab correctly, why are the base layer objects not at the top of the tab order list by default? Is this by design, an oversight or a bug?

With thanks