Worksets Hopping About a Bit?

When using a workshared file, we've found that on occasion, the active workset seems to change itself for no apparent reason. This particular quirk has always stumped us. Recently however, we have got to the bottom of this. I'm not entirely sure if this is a bug or by design, but the following is the behaviour that causes this to happen

In this scenario. Worksharing is enabled and 'Workset1' & 'Shared Levels and Grids' are created automatically. In addition, I have added a workset called 'A'

'Workset1' is the active workset. Note the following rules:

• On opening the workset dialogue, the Active Workset combo box always has initial focus
• The Active Workset combo box can only be populated by open worksets

Now we decide that we want to close 'Workset1'. On leaving the Workset dialogue, everything is normal and 'Workset1' is still listed in the main Active Workset box at the bottom of the main screen

Now we want to re-open 'Workset1', so we go to the workset dialogue. Under the two rules above, Revit jumps straight to the active workset combo box and says "Hang on, 'Workset1' isn't open, so it's not in the list. Therefore I will leap quick smart to the first entry in the list, in this case 'A'". 

Because the user's focus is on re-opening 'Workset1' in the table below, this sleight of hand by Revit is easily missed, resulting in the following

So the moral of the story is to remember to set back the active workset immediately after. Hope this helps