InvalidateUnboundRow is not returning. Notice in the attached screenshot that I have a breakpoint at the call and at the end of the eventhandler. It never gets to the next line or the breakpoint.
I tried changing the "void" to "async Task" with an "await Task.Delay(200)" before the call and it still did not return.
I am not asking if you can recreate the problem; but what would cause the function not to return?
This grid seems to have async/Tasking issues. I have another issue that I will submit.