WHBM : no problems with those for airport control if that was your question. In Germany for instance when they want to control a Schengen flight they have 2 police guards at the entrance of the jetway controlling IDs as pax exit the aircraft it can take 5-10 min more to disembark that is all .
The Schengen treaty is not given up as your title says , just one of its provisions is applied more often , not really surprising considering the geopolitic dangerous situation we have in Europe currently