Hi,

It seems that default layout doesn't work as expected. It's not applied by default even though fields defined in in this layout are present on underlying objects. 

Please see following two issues:

Issue #1:

1. Start with fresh app by running attached sample.
2. As a first thing, try clicking on filter icon on any of the headers.

Expected:

1. Menu unfolds so you could configure your filter

Actual:

1. Menu flickers and you need to open it again.

Issue #2:

1. Start with fresh app by running attached sample.
2. Expand few nodes
3. Click "Clear" button (this should cause new "rouge" layout to be created, it's bit random so you might need to get back to point 1 and start again)
4. Click "Load" button

Expected:

1. Data is cleared when clicking "Clear", no new undesired layouts automatically created
2. Data is loaded and visible on the grid

Actual:

1. Quite often new 0-field layout is created (vide attached image with the breakpoint and stacktrace)
2. Default layout is not used buy newly 0-field is. No data visible on the grid. Headers missing.

Please also see the comments in MainWindow.xaml file next to layout definition.

Attachment content:

1. Sample application
2. Screenshot of the Issue#2

Kind regards,

Artur