@RobertoBautista 

Hi, welcome to the community.

Did you mean changing the security to WPA3-personal(not WPA2/WPA3 mixed) only, some devices will disconnect from Deco and if changing the security of the guest network to WPA3-personal only, the same device will work fine, right?

What are these devices?

And would there be any error message when they failed to connect to the Wi-Fi?

Thank you very much.

  @RobertoBautista 

Nice to see you again.

Sorry that I missed the reply to your first feedback.

Is your Lenovo T41 laptop ThinkPad T14 20W0S1C800?

I see your first feedback also mentioned your smartphone and did it still have the same issue as well? If yes, may I know the model as well?

Later I will follow up on your case via email in case it might need to be forwarded to the senior engineers and please also check whether you could get the email or not.

Thank you very much.