DataGrid refresh doesn't work while the refreshed row attached to VisualTree

[tiborkerenyi]

Describe the bug

DataGridTest.zip

DataGrid_refresh_issue.mp4

To Reproduce

1. Run the test solution.
2. Watch the line 55.

As you can see in the video, line 55 is only updated when it re-enters the visible area.
(Until then, the row will be erroneously moved to row 2.)

Expected behavior

When the ObservableCollection changes, the DataGrid should also be updated.

Avalonia version

11.1.1

OS

Windows

Additional context

No response

[tiborkerenyi]

If you change this two lines in the code, it works proprerly:

adatok[0] = adat;
adatok[55] = adat; => failure

adatok[55] = adat;
adatok[0] = adat; => works well

[nww02]

+1 on this one.

When I select a row in a DataGrid I show a panel to the right with the row's contents for better display and editing.

When Selecting an Item,
a) a reference is set in the ViewModel to the dataGrid.SelectedItem.
b) an Observable boolean "ShowEditPanel" is set to 'true'.

When the panel sees the boolean change, it pops up. The DataSource is set to the reference object in the Viewmodel. It shows the row contents perfectly. However, when I change the object using TwoWay binding in the panel, the original data cell doesn't update until I scroll the row out of sight, and back again.