Hi everyone,

I am experiencing a persistent issue with my Deco XE75 V1.0 (EU) running the latest official firmware 1.4.3 Build 20240926 Rel. 38336.

My ISP is Dimensione (Italy), providing a 2.5Gbps fiber connection via ONT and PPPoE. In the system logs, I see the following error recurring precisely every 10 seconds:

daemon.notice pppd[XXXXX]: len < 0 daemon.notice netifd: internet (XXXXX): len < 0

Impact: While the connection doesn't drop for standard browsing or streaming, these errors cause micro-lags and "packet buffering" on time-sensitive applications, specifically ADS-B receivers and GNSS miners connected via wifi.

Technical Analysis: My ISP’s technical support analyzed the logs and confirmed that this is a known bug in the PPPoE/netifd parser (likely related to LCP Echo Request handling) within the Deco firmware's OpenWrt-based backend. They mentioned that this has been addressed in newer firmware versions for other regions/models.

Troubleshooting already performed:

• Tested MTU at 1492, 1480, and 1472 (no change).

• Disabled IPv6 (no change).

• Replaced the WAN cable with a certified Cat6 (no change).

• The issue persists even with minimal network load.

Since 1.4.3 is currently the latest available version for V1.0 EU, is there a Beta firmware (e.g., 1.4.4 or 1.4.5) or a specific "Lab" release that includes the fix for this PPPoE parser bug?

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Thank you in advance for your help!