Split tunnel and route list not working

[roband]

Hello everybody, I have strange problem with 2 vpn clients, my company has a fortigate 201E. Employees connect through forticlient and split tunnel is enabled for a route list of internal network resources. All work fine for 20 people, 2 can connect but aren't able to resolve hosts name or fqdn name. This happend only when they connect trough their home ISP router although they are receiving correct DNS suffix and internal dns server. If they connect using tethering name resolution work fine. The difference I have notice is that during first option they aren't able to download the route list for internals  resource. The 2 OS client are windows 10. what can i do? Thanks in advance

[joe_FTNT]

Try disabling IPv6 on their network interfaces if not in use. There is an issue being tracked where FortiClient seems to stop resolving when ISPs have DNS over IPv6 enabled and doesn't move past it to your IPv4 DNS servers. Just a guess, might be unrelated, but something to try.

[roband]

Dear joe_ftnt, ... correct ... disabling ipv6 solved my problem! 

Thank you very much for support!