Works for me. Couple of hours without a single drop.
Id suggest we each take this with your local Samsung distributor. The more pressure we put on them the better.
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Original Story:
I have a per of QN90c 75" TV and a Q990B soundbar. After the TV was updated I immediately noticed sound drops with my soundbar. The drops would come at random intervals. Resetting the TV does not help. Neither does changing sound modes. Output via TV Speakers seems to be working fine drops-free. Searching online i found a few more similar cases with different Samsung TV models and Samsung soundbars affected by the same firmware.
Yesterday I had remote maintenance from Samsung Support, where the HDMI ports were reset and eARC was turned off in the settings. Unfortunately it didn't help. I only notice if I turn eARC on (auto) and off in the settings after switching on the TV, the sound dropouts are gone. Only when I turn the TV off and back on again and don't change the setting do the sound dropouts immediately come back. I'll call support again.
Its clearly multichannel sound problem of internal apps. No factory reset of soundbar or tv will help. I even tried to connect soundbar with fiber (digital audio) ... same drops.
Seems like toggling off/on eArc automatic in TV sound settings temporarily solve the issue (till you turn off the tv). Needs to be done every time you turn on the tv.
