@TP-Link Thank you for your answer. It does not solve my issue, but at least it shows me that other customers are facing the same issue and will face it for a long time as it does not seem that something will be done in this area.

Sadly what I read in that thread is looking the same that what I can read on other threads. I guess you are doing your best on this forum to help customers but tp-link has to understand that a Deco X90 kit is more than 600€. The corresponding Asus kit is 400€. There are no such silly limitations when you buy Asus network equipement, even though Asus is not targeting networking as a primary business. I can't undestand this.

This limitation should have been recorded and fixed on earlier versions of Deco (M9 Plus for example, that was similarly expensive ...) for months, not to say years now. There is a defect in the way guest network is working, and this enough this raise some priorities at development team to fix it. The set of features on Deco devices did not changed a lot for one or two years now. What could be understood as a starting point at that time is now, from my point of view, feeling like lack of capacity to maintain features up to date and align with other brands, as well as aligned across tp-link products.

I really hope that you will be able to push, once again, the product requirement to your team. As well as others that start becoming very urgent to fix !