KO______ You might be taken to a secondary interview room but its routine and not likely to be about you rather than you meet a variable in their procedures.
depending the time and place, interview in a room can be mandatory. It has often been the case a Kunichina Gora border point after Koidula in Estonia, by Pechory, on the way to Pskov.
There all travelers, by regular bus route, by car, on their own, whatever, have been taken to interview. Hence the damn long queue sometimes.
there is also these days since 01.2025 and the unified visa, mandatory interview to all non-belarusians and non-russians at the crossing points Belarus-Russia by road. Can be whatever from quick superficial to deeper questionings and often quick fingerprinting and photography with their mobile device.