Why is hostednetwork bridge not working on Win10LTSB VirtualBox?

Question

WiFi

There is:

• Debian 9 guest
  
• Host Windows 10 LTSB VBox 5.2.16r
  

The host is running a virtual access point network (hostednetwork) and the ICS service is disabled. The guest is bridged into this network to act as a gateway, dhcp, dns.
The smartphone, when connected to the network, receives an ip-address without any problems and communicates with the guest OS, i.e. all pings pass, all dns requests work, everything works if you directly contact the gateway or its services.
The problem lies in the distribution of the Internet (NAT), forward packets from the smartphone do not reach the gateway (guest OS). Checked with wireshark and tcpdump.
Oddly enough, this bundle worked without problems on windows 10 single language. I suppose some process or windows itself catches all forward packets even before the guest machine, for a week now I can’t determine what’s stopping it.
What could be the problem?