no navigation with L2TP IPSEC with windows native client

hello all

apologize in advance for my english

i'm trying to set up ltp2 vpn in my fortigate 60e 6.2, i followed this simple guide and windows connect successfully, i am assigned correct ip range and dns and i can access my internal stuff, but there's not connection to internet, even tho split tunnel is enabled

i checked the policies and everything appear to be in order and i can see the user connected in fortigate ipsec monitor

if i uncheck “Use default gateway on the remote network” on windows connection setting, navigation works normally but then i can't access internal stuff (what is the vpn even doing at this point?)

everything works fine with regular ssl vpn connection with forticlient

appreciate any help, thanks