Definitely get a case opened to track this first and foremost. I was going to say go to 30.6 as I know that version has tons of bug fixes, but looks like you already did. My personal 2 cents here, is stability > features. I'm pretty much running 28.7 for all MR44's because its been rock steady and stable. I honestly could care less about fancy features, if the code isn't stable, I'm not interested. Nothing quite like unstable firmware code to make you look incompetent to the business, been there done that and it's stress I never want again. I would downgrade to 28.7 for production environments (or whichever stable version you were on before), and then have that case opened and an engineer to work with you directly via a lab environment with 30.6 and get PCAPs and figure out what's what, and until you have a fix, hold off on upgrading.
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