Hello  @ppredator83 ,

Welcome to our community.

Have you not subscribed to an IPv6 plan? When IPv6 is enabled on your router but your ISP doesn't provide IPv6 connectivity (or hasn't provisioned it for your account), the router may still attempt to send and route IPv6 traffic, but those packets may fail to reach their destination — which could manifest as packet loss during a ping test. This would also explain why disabling IPv6 resolves the issue.

To check if this is the cause, we'd recommend contacting your ISP to confirm:
• Whether your current plan includes IPv6 support
• Which IPv6 connection type they use (e.g., Dynamic IP, PPPoE, DS-Lite, etc.), so it can be configured correctly on the router

If your ISP does support IPv6, you can log in to your router's web interface at http://tplinkwifi.net, go to Advanced > IPv6, and make sure the connection type is set correctly according to your ISP's specifications.

Best Regards.