Sonos has been busy addressing a series of technical challenges across its product ecosystem, ranging from software connectivity hurdles to regional service limitations. The company is currently navigating reports of hardware handshake issues with its latest home theater equipment and persistent voice assistant bugs on its standalone speakers.
Connectivity Issues Between Arc Ultra and Modern Displays
The new Sonos Arc Ultra and Sub (Gen 4) are facing significant audio stability problems when paired with specific television models. According to user reports on the Sonos community forums, owners of the Hisense 55U7NQTUK and LG QNED86B have experienced severe HDMI eARC malfunctions. The visual indicator of these issues is often a sudden, complete loss of sound during playback.
maximum level immediately upon powering on the television. While users attempted to mitigate this by setting a volume limit for the Arc Ultra Room, reports suggest this did not resolve the behavior. The technical cause appears to be HDMI eARC/CEC handshake failures between the soundbar and the display hardware.
To stabilize the connection, community members suggest the following steps:
- Disable HDMI-CEC on peripheral devices, such as an Amazon Fire TV Stick, while leaving it active for the Sonos soundbar.
- Utilize a CEC blocker to prevent interference from other connected HDMI hardware.
Recurring Alexa Disconnections on Era 100
Beyond the home theater segment, the Sonos Era 100 is experiencing a specific software bug involving the Amazon Alexa voice assistant. Users report that the speaker periodically stops responding to the wake word, even though the physical microphones remain active. The detail that matters here is the frequency; affected users note the assistant typically fails every two weeks.
Sonos support has reviewed diagnostic reports from these units and identified potential network interference as a contributing factor. The current temporary workaround requires you to remove and then re-add Alexa as a voice assistant within the Sonos app. For a more permanent fix, Sonos suggests resetting both the local network and the speaker. The company advises users to submit a system diagnostic within 10 minutes of a failure to help support teams identify network-specific triggers.
Cloud Service Restrictions in Russia
On a different front, Sonos has significantly altered its service availability in Eastern Europe. As of August 2026, users in Russia report they can no longer perform software updates on their speakers. Sonos support confirmed to users that cloud services are no longer available in the region, following the company's previous decision to cease sales and block state-connected radio stations.
This restriction has led to hardware failures during maintenance; one user reported a Sonos Move 2 became unusable after a factory reset because it could not reach the servers to complete the mandatory initial update. While some owners have discussed using router-level VPNs to bypass these blocks, the effectiveness is inconsistent due to the closure of specific server locations. This follows the 2022 removal of Yandex Music from the Sonos platform.
As Sonos continues to roll out firmware updates to address the HDMI handshake and voice assistant bugs, the regional service outages highlight the increasing reliance of modern audio hardware on stable cloud infrastructure. Whether software patches can resolve the hardware communication issues with LG and Hisense panels remains the primary focus for home theater enthusiasts.