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Alternated IP config does not work on Win10 like it is setup in the config

I do have to use a win10 pc to remote a system that shall work even if the router isn’t working any more as the pc is used for remote a system where damage is possible if you are not able to remote the system.

Normal is dhcp a good solution for the system and I like to use it as long it is possible but in case of the DHCP-Server isn’t workin any more I like to use alternativ config for the ipv4 as than this wouldn’t do anything to the system itself and Internet isn’t important as loosing control over the remoted system as without the server there is no internet working at all but the home LAN should work allways.

At the moment I get even with the setup of IP=192.168.2.142/255.255.255.0 allways when there is no dhcp the 169.254.22.54/16 what is not use full at all.

Does someone know what is wrong with Win10 and alternated IPconfig