Unsure if this is a bug or working as expected.
In our current scenario we use the New Tab Button in conjunction with the TabOverflowBehavior, ShrinkWithMenu on the MDI but have seen this with jus
As you can see from my gif the New Tab Button moves around a bit, until it gets to a state where it is unusable!
I have also noticed that when paired with ScrollWithMenu when you add a new item the last item is shown, and then you have to scroll to the new tab button which is rather annoying if you plan to add a few as you have to go new button, scroll, new button, scroll etc.
Do you know of a work around to make the New Tab Button always be in view at the end?