Hyper-V Virtual Switch issue: Same IP on guest and host
Some DHCP servers always assign the same IP address to the same MAC.
Since your upstream is a regular (non-WDS) Wi-Fi connection, it can only have one MAC address – not multiple. The only reason Windows even allowed you to put it into a bridge is that it performs L2 NAT (arpnat) for you, rewriting your VMs' packets on the fly.
You can fix this, by going inside the VM settings:
Network Adapter/Advanced Feature and then
either apply a static MAC or dynamic MAC, but then you need to
Enable MAC address spoofing.
To make sure that VM will use a dedicated and spoofed MAC to act like a real network device.
Enable MAC address spoofing: