When searching for something in the Assets tab it doesn't refresh or work correctly with the selected path.
Example:
Lets have this folder structure:
/
|-A
|-a.xaml
|-B
|-ab.xaml
|-b.xaml
1) Have the root folder "/" selected
2) Write in the search field "a" and it will find the "a.xaml" from the "A" folder and "ab.xaml" from the "B" folder. All good up until now
3) Click and select folder "B" and you will see that it doesn't refresh to only "ab.xaml" from folder "B"
4) Add a "b" to the search field to have "ab" and the result still doesn't refresh
5) You need to completely clear the search field and start typing "a" again to get the "ab.xaml" result shown from folder "B"

So the way I see it, the Assets tab folder selection and the search text field should always work correctly - either if you select a folder or write to the search field - it should always update and not stay in a cached state