After add/remove osm-notes layer - map not scrolling, notes not shown.

[progserega]

1. I add osm-notes layer by code:

this.osmNotesLayer = new leafletOsmNotes();
this._map.addLayer(this.osmNotesLayer);

1. Layer success added. Notes shoing on map. Scrolling map is work.
2. I remove osm-notes layer by code:

this._map.removeLayer(this.osmNotesLayer);
delete this.osmNotesLayer;

1. Layer with notes removed - notes removed from map, but scrolling of map is broken. I can not scroll map my mouse.
2. If I again try add osm-notes layer - layer not added, notes not shown.
3. After reload web-page - osm-layer can show again, but also only once.

I sink, that code

            map  
                .on('viewreset', this._load, this)
                .on('moveend', this._load, this);

set event handlers on add layer, but not remove default handlers on remove layer.