I went to my local Bose Support Centre and they exchanged my old one with a brand new qc35ii. It is on 2.0.1. Never upgraded. The ANC is much better now, back to what it used to be. The customer service officer tested and compared my faulty one with another QC35ii, he didn't notice much dfference. However i really notice the difference, the new one has the cabin pressure feeling and the faulty one has not. I suggest you do the same, change for a new one asap.
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