polska.e-mapa.net is a map portal run by us (Geo-System; commercial company),
whereas the current url of the layer is https://integracja02.gugik.gov.pl/cgi-bin/KrajowaIntegracjaEwidencjiGruntow (WMS service owned by GUGiK; Head Office of Geodesy and Cartography in Poland), so there's a clear mismatch.
title should be changed to "Krajowa Integracja Ewidencji Gruntów" (official name of the service, matching the URL) or a more descriptional "Parcels and buildings"
The proper URL should point to integracja.gugik.gov.pl (main server that does the loadbalancing) or switch between integracja01.gugik.gov.pl and integracja02.gugik.gov.pl
the layer should also use dzialki (parcels), not only budynki (buildings), so the part of the url should be changed from ...&LAYERS=budynki... to &LAYERS=dzialki,budynki
polska.e-mapa.net is a map portal run by us (Geo-System; commercial company), whereas the current url of the layer is https://integracja02.gugik.gov.pl/cgi-bin/KrajowaIntegracjaEwidencjiGruntow (WMS service owned by GUGiK; Head Office of Geodesy and Cartography in Poland), so there's a clear mismatch.
To fix this the layer should use metadata entries from the service capabilities (https://integracja.gugik.gov.pl/cgi-bin/KrajowaIntegracjaEwidencjiGruntow?SERVICE=WMS&REQUEST=GetCapabilities):
title should be changed to "Krajowa Integracja Ewidencji Gruntów" (official name of the service, matching the URL) or a more descriptional "Parcels and buildings"
The proper URL should point to integracja.gugik.gov.pl (main server that does the loadbalancing) or switch between integracja01.gugik.gov.pl and integracja02.gugik.gov.pl
the layer should also use dzialki (parcels), not only budynki (buildings), so the part of the url should be changed from ...&LAYERS=budynki... to &LAYERS=dzialki,budynki
Proposed icon: https://integracja.gugik.gov.pl/ikonki/kieg/mapa_ewidencyjna.png