@JayinNZ 

Thank you for your post. Have you noticed when this issue first started—did it appear right after a firmware upgrade or after any other configuration changes? Or did it begin following a device reboot? Does rebooting the router provide only a temporary fix? Have you made any specific settings on the router?What exactly do you mean by “degrading of services”? When it goes offline, you can ping the connectivity between it and the Controller.

  @JayinNZ 

Thank you so much for taking the time to post the issue on the TP-Link community!

To better assist you, I've created a support ticket via your registered email address and escalated it to our support engineer to look into the issue. The ticket ID is TKID250950937 please check your email box and ensure the support email is well received. Thanks!

Once the issue is addressed or resolved, welcome to update this topic thread with your solution to help others who may encounter the same issue as you did.

Many thanks for your great cooperation and patience!

  @JayinNZ 

Regarding the switch disconnection you mentioned, please double-check the physical connections and related factors. As noted in the email, our senior engineers are analyzing your network issue and will reach out with any updates.