Contacted live chat, they were absolutely useless. Then spent 30 mins talking to UK support call centre, remote connected to my TV, saw the issue with the locked sound setting in Netflix, response was not a known issue yet, talk to your amp manufacturer or Netflix. Useless!
Seem's i've fallen foul of this firmware upgrade too, Happened while i was working away, Now my Q70R soundbar does not work with the HDMI ARC for any sources.
This includes the Netflix App and SKY Q as a source
Now i am limited to using the TV sound instead of my Sound Bar. If i had realised the auto update feature was enabled, i would have turned it off from day one.
I have raised a ticket with Samsung support, lets see what they say...
Reply from Samsung :"Dear Fausto, This is regarding your recent contact with Samsung Live Chat Support. We understand you are facing HDMI-ARC connection issues after performing a software update on your TV. We would like to assure you that we do not have any such reported issues for the model of Samsung TV you are referring. As you have mentioned that reset already performed on TV and still you have connection issues, we recommend you wait for next firmware update or get the TV diagnosed by an authorized service centre. You may copy the below given link and paste in a new browser window to open a service request page. https://www.samsung.com/us/support/service/ You may contact Samsung Support for any further assistance if case you are not able to file a service request. Thank you. Samsung Online Support"