Having a strange problem on my Pi400

after it sucsesfully authenticates on the Wifi it almost always fails to
get a valid IP address & adopts a 169.254.x.x address.
I am not using my routers DHCP server but have dnsmasq on another server
because I hve equipment that needs additional options.
The problem is considerable less if i use the guest network (which does
get dhcp from the router) but even that fails to renew correctly &
reverts to a 169.254.x.x address. it also fails to reconnect correctly
after a reboot needit a number of disconnects

The same SD card works without issue in a Pi4B

I do suspect the Virmin Media stupid humb 3 may be playing some part as
connecting to my mobile phane as a hot spot has sofar failed to exhibit
these issues.

This may be the final excuse i need to ditch VM wifi but would like to
know that what ever i buy will not have the same problem






--
Bypasses are devices that allow some people to dash from point A to
point B very fast while other people dash from point B to point A very
fast.  People living at point C, being a point directly in between, are
often given to wonder what's so great about point A that so many people
from point B are so keen to get there and what's so great about point B
that so many people from point A are so keen to get
_____     there.  They often
wish that people would just once and for all work out where the hell
they wanted to be.
  -- Douglas Adams, "The Hitchhiker's Guide to the Galaxy"

--- SoupGate-Win32 v1.05