I recently bought a TP-Link Archer A10 Pro in japan (model available only there I suppose), and I have a very annoying issue with it;

The internet connection resets between 1 and 3 times a day (maybe more since I don't check when I sleep).

It happens on the internet connection itself, and can be seen on all my devices, both wifi and LAN.

It's super annoying since I use it for remote work, through my company VPN.

The connection to that VPN has to be kept on to work properly and avoid me to lose my work, so it's a big issue.

I'm using IPv6 Plus (whatever that means) with NTT provider.

I first though it was the ND Proxy release time (set by default to 86400) causing it, but since it's disconnecting more than once a day, it can't be the cause.

My old ipv6 modem worked perfectly, no disconnection of any kind.

Is there anything I can test out to try find/fixing the issue?

Thanks.