I found a temporary fix. I set my Guest Network to only use 2.5 GHz and I connected my work laptop to this network. Now the VPN seems to hold.

i just installed a set of 3 deco x20 but I can't connect to my work VPN (The work VPN works fine with other routers or other VPNs work fine with the deco connection (like NordVPN on my phone)). I am...