Updated to 4.3.6, ANC noticeably decreased
I bought a pair of Bose QuietComfort 35 Series II end of Dec 2018, they worked amazing for 3 or so months, then all of a sudden everything just stopped working, blutooth, buttons, everything, the headphones were just done for, though my usage never changed, just gently switching them on and off - never leaving my room etc, only used for a few hours at a time at best every few days, barely had them for 90 days.
Then I updated the firmware thinking it might help and the noise cancelling noticably decreased and made everything worse. I reached out to Bose via email but unfortunately there was no reply after 1-2 weeks, so I exhcanged the pair for a new one at the store originally purchased.
The new headphones were perfect again. Which didn't last.
I've had them for less than a week and today after fully charging them I turned them on and noticed a bit of a hissing sound, enough to get annoyed by it, so I quickly updated the firmware to 4.3.6 thinking this might possibly help my fresh pair (I didn't learn) - now even though the hissing is mostly gone yet again the ANC has decreased dramatically - there's basically no difference from low or high, there's no noticable change when switching through the levels of ANC, it just feels like the noise cancelling is switched off - even on high, cars driving past are obvious now, dogs barking, doors closing in the house - all things that used to be completely blocked out are now too obvious. Slightly blocked, but enough to distract and catch my attention unlike before.
I'm very frustrated and thinking of switching to Sony as I just may not have a choice even though I'd much prefer to keep my Bose, I already have no choice but to return this pair again as they definitely aren't working the way they once did after updating.
I was breifly reading online and it seems like a lot of people are also having this decreased noise cancellation after updating the firmware, is this a recognised bug or issue that might be addressed? Have I perhaps missed something in regards to updates or info regarding this issue? I thought I might just post here in case someone might be able to share some thoughts on the matter as I've unfortunately had a bit of trouble contacting Bose directly~
Thank you for any help! Greatly apprecaited!