Leaflet: Layer disappears on some zoom-levels - leaflet

Question

On this Leaflet application I show all available bus stops in Denmark.
http://drivetime.mapicture.dk/stops
The strange thing is, that if you zoom down to one of the last 4 zoom levels, the layer with these bus stops simply disappears. They reappear when you zoom out again.
The bus stops are made as a single layer retrieved through a WMS request to our Geoserver. The entire javascript code is actually pretty simple, so I have trouble finding out, what causes this behavior.
function CurrentStopsMap(mapNode, zoomSettings) {
var self = this;
self.mapNode = mapNode;
self.zoomSettings = zoomSettings;
self.mapquest = new L.TileLayer('http://otile{s}.mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.png', {
maxZoom: 18,
attribution: "©<a href='http://openstreetmap.org/' target='_blank'>OpenStreetMap</a> contributors, Tiles Courtesy of <a href='http://open.mapquest.com' target='_blank'>MapQuest</a>",
subdomains: ['1', '2', '3', '4']
});
self.regions = new L.TileLayer.WMS("http://backend.mapicture.dk:8080/geoserver/mapicture/wms", {
layers: 'mapicture:region',
format: 'image/png',
styles: 'regions',
transparent: false
});
self.stops = new L.TileLayer.WMS("http://backend.mapicture.dk:8080/geoserver/mapicture/wms", {
layers: 'mapicture:stops',
format: 'image/png',
transparent: true
});
self.map = new L.Map(mapNode, {
center: new L.LatLng(zoomSettings.lat, zoomSettings.lon),
zoom: zoomSettings.level,
layers: [self.mapquest, self.stops],
zoomControl: true
});
L.control.layers({
"Kort": self.mapquest,
"Områder": self.regions
}, {
"Stoppesteder": self.stops
}).addTo(self.map);
}
var zoom = {
lat: 56.24,
lon: 10.68,
level: 7
};
var map = new CurrentStopsMap('map', zoom)

Answer 1

This was actually a problem with the Geoserver daemon.