CLONE - Asynchronous tab loading fails to load first TableView column header

Having asynchronous loader loading tab page with TableView fails to load the first column header. Attached tar includes my minimal test case hitting the issue that can be run with qmlscene tool.

Steps to reproduce:
1. qmlscene main.qml
2. Choose one of async: true tabs
3. See that there is only name header

Console log after exit:
"There are still "2" items in the process of being created at engine destruction."

When testing locally the test case headers managed to load once but other over tens time failed. If it is some kind of timing issue then it may not reproduce on all configurations. But I don't know if the bug is timing issue or not.

Both 5.2.0 and a few days old 5.2.2 from git both are failing the test case.