access point gateway ip problems

Hello Mikrotik PPPOE server and Bridge Networks..

Here is the problem in this way some devices like an access point, the gateway IP address seem to have.

network structure: Bridge Wds Transparan Mode

I thank you in advance ( I don’t know very good English I’m sorry )

Why did you set the network address to 172.16.0.1 ?

/ip address set 0 network=172.16.0.0