Assertion when scrolling qml Table View

[Sheep]

Greetings
I have a problem.. i keep getting this assertion when scrolling the table view..i noticed they happed when i call TableView::forceLayout().
The reason when i call the TableView::forceLayout().. when scrolling is that the table delegate`s heights depend on the their content..hence if i dont all that function, the delegate content keep overflowing the delegate items.
Although everything seems fine when i "ignore " the assertion...i cant rely on that ... any advise or workaround is welcome.