Clipping by Polygon may leave geometries outside polygon

[craig-o]

1. Download the following file

https://download.geofabrik.de/russia/northwestern-fed-district-latest.osm.pbf

2. Clip by polygon

osmconvert -v ./northwestern-fed-district-latest.osm.pbf -B=Russia_Nenets_Autonomous_Okrug.poly --complete-ways -o=nenetsconv.osm.pbf

3. The output pbf contains geometries outside the original polygon, see the highlighted geometries in yellow.

nenetsconv.zip
Russia_Nenets_Autonomous_Okrug.txt

osmconvert --help
osmconvert 0.8.7

[F-I-D-O]

I can confirm that geometries outside (like completely away, not the ones crossing the border) also happens when specifying the rectangle with the -b option.

[biodranik]

Are these geometries a part of any relation inside polygon?