WNDR4500v2: Wireless isolation doesn't work on guest network

I was contacted by the support team and they indicated engineering had made a change to the firmware and asked me to be a Beta tester.

I was sent a large contact to sign away my rights and first born in order to be a Beta tester.  I said I would be willing, but would need a test piece of hardware in order to properly test since they also repeadly said it might brick my personal one that is currently in operation.  They refused to send me hardware for testing.  (Note that I offered to send it back when finished.....I'm not looking for handouts--I'm looking for a way to conduct a Beta test in a safe and effective manner, which is also what I happen to do for a living {but with industrial machinery firmware}).

So obviously this issue got someone's attention, and they seemed to have a proposed fix ready quite quickly. 

It would be great to get a status update.  If it's "it'll be in the next firmware update, slated for xx".....that's fine, at least we would have a general timeline and expectation of a fix.