Dear TP-Link Support, @Sunshine   @David-TP    @Marvin_S Wayne-TP

I am facing a recurring issue where my TP-Link RE450 extender intermittently loses the 5GHz backhaul connection with my TP-Link NX200 router, even though both devices are configured properly and working fine initially. After a few minutes or hours, the RE450 shows that the main router’s 5GHz network is not available, and I need to manually reconnect it. The 2.4GHz link remains stable.

Here are my details and configuration:

• Main Router: TP-Link Archer NX200 v1.0 (Wi-Fi 6)

  • Firmware Version: 1.5.0 3.0.0 v60a2.0 Build 250818 Rel.41696n

• Extender: TP-Link RE450 v4.0 (Wi-Fi 5)

  • Firmware Version: 1.0.20 Build 230213 Rel.55420n (6985)

• Wireless Setup:

  • Disabled Smart Connect, assigned different SSIDs for 2.4GHz and 5GHz on NX200.

  • 2.4GHz SSID = Home_2G (fixed channel 6, width 20 MHz)

  • 5GHz SSID = Home_5G (fixed channel 44, width 40 MHz)

  • RE450 configured with the same SSIDs (Home_2G and Home_5G) to allow EasyMesh/roaming for 2.4GHz devices and seamless connectivity for 5GHz-capable devices.

• Issue Observed:

  • Devices connected to 2.4GHz SSID work consistently.

  • Devices on 5GHz SSID initially connect fine but after some time the RE450 reports that the NX200’s 5GHz network is unavailable, even though the NX200 continues to broadcast 5GHz normally.

  • A manual reconnect on RE450 restores the 5GHz backhaul temporarily.

  •  

• Additional Note:

  • With my previous main router (TP-Link MR600) paired with the same RE450, there were no issues. Both worked seamlessly under the OneMesh setup.

  • This problem only appears with the NX200 + RE450 combination.

  • Could this be related to a Wi-Fi 6 (NX200) and Wi-Fi 5 (RE450) compatibility issue?  

Requesting your guidance if this is a known compatibility issue and whether a firmware update or configuration change can resolve the 5GHz backhaul disconnection.