# Bug Report: Faulty TSO/GSO Implementation in Beryl AX Firmware 4.9.0 **URL:** \ **Category:** Router\ **Created:** [May 22, 2026, 10:42am UTC](https://forum.gl-inet.com/t/bug-report-faulty-tso-gso-implementation-in-beryl-ax-firmware-4-9-0/68871 "2026-05-22T10:42:21Z")\ **Posts on this page:** 1\ **Showing post:** 12
**Author:** ![will.qiu](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/w/b38774/32.png) [@will.qiu](https://forum.gl-inet.com/u/will.qiu)\ **Post date:** [August 25, 2026, 3:27am UTC](https://forum.gl-inet.com/t/bug-report-faulty-tso-gso-implementation-in-beryl-ax-firmware-4-9-0/68871/12 "2026-08-25T03:27:44Z")
Thank you for following up. We previously tested this internally using the steps provided, but were unable to reproduce the issue on the Beryl AX. More recently, another user reported a potentially similar issue on the same MediaTek-based [Flint 2 (GL-MT6000)](https://forum.gl-inet.com/t/gl-mt6000-flint-2-gro-on-wan-silently-corrupts-forwarded-tcp-payloads-above-25-mb-s-fw-4-9-1/70684). We have reproduced that issue internally and are investigating whether the two reports share the same root cause, as well as a possible fix. We cannot yet confirm that they are the same issue. We will share any relevant updates here when available. --- _[View the full topic](https://forum.gl-inet.com/t/bug-report-faulty-tso-gso-implementation-in-beryl-ax-firmware-4-9-0/68871)._