My conversation with LSI ended when they told me I should replace my SSDs with ones on their approved hardware list. Frankly I've not found their first line support very helpful. If their first line support aren't listening to their customers problems but are trying to find excuses for not helping then it doesn't surprise me it takes them weeks for them to recongise a problem with their firmware. Hopefully you'll be able to escalate this to someone who will take notice.
Glad you guys have been able to reproduce the issue, I was starting to think I was alone in having this problem.