Hi TP-Link Team,   @Sunshine  @Joseph-TP   @David-TP 

I am facing a delay issue with automatic failover and failback in my TP-Link Archer MR600 V2 router.

Device Details:

• Model: TP-Link Archer MR600 V2
• Hardware Version: Archer MR600 v2.0
• Firmware Version: 1.9.0 0.9.1 v0001.0 Build 250915 Rel.52419n

Issue:

• When primary WAN (fiber connection) goes down, router takes around 3–5 minutes to switch to backup 4G SIM (Jio).
• Similarly, once WAN/fiber connection is restored, switching back from SIM to WAN also takes several minutes.
• During this delay, internet is unavailable and affecting usage.

Additional Info:

• I faced the exact same issue earlier in TP-Link NX200 V1.
• At that time, TP-Link provided a beta firmware and the issue was resolved successfully.
• Now I am observing the same behavior in Archer MR600 V2 as well.

Request:

• Please check whether this is a known issue in current firmware.
• Kindly suggest any configuration changes/ workaround , or updated/beta firmware available to improve WAN failover and failback detection time.