I'm surprised that a F5 rep has not popped in to comment on this issue. As a potential buyer this is the kind of thing that may well scare me off. If there is something unique about the various builders' configurations that are causing the issue, the F5 should be working to identify the potential causes. If it's caused by poor subcontractor QC, or a design flaw, F5 should be on the boards explaining it.

But the silence is puzzling and does not reflect well on the company.