@David-TP many thanks for your reply. I have experienced this on many difference devices (laptop and mobile). I doubt that's the reason: my devices don't auto-join to the main network as I use it...

@David-TP now most of the times the guest network is working but sometimes it just loses internet connection. switching to the main network I get internet access. this is way harder to debug as it's...

@David-TP this worked! thank you so much! I was trying to solve this since july and trying to get in touch with someone from TP Link for more than a month. Finally a solution. Thank you!

@PaulMM I also sent an email and I'm still waiting for a reply. This is – by far – the worse customer service I have seen in my life. They stopped replying to e-mails more than one month ago and...

@PaulMM I am having the same problem with a X50-5G and some X50s connected via ethernet backhaul. How can I access the beta firmware to see if it solves it?

@Infryndiira I am having the same problem with a X50-5G and some X50s connected via ethernet backhaul. How can I access the beta firmware to see if it solves it?