It’s only baffling if you pretend that they are not actively trying to inconvenience cyclists with bad infrastructure.

In my city (in Germany) I have to do these kind of maneuvers every few meters as streetlights and even some signs and trees are intentionally put close to the center line of bike lanes barely 1 meter wide.

Sure would be a shame if someone’s old beater truck with a steel bumper ran that sign over causing the council to have to remove it.