I'm quite new to OpenLayers. Right now I'm using it with OSM for a project and I'm facing what seems an issue to me: when I set an Overlay while zoomed in to max resolution, then, when I zoom out, the marker looks like it have moved to a different location. If I zoom in again everything is correct.
I this a bug in OpenLayers?
I'm using projection EPSG:3857 all the time and the marker positioning is set to "bottom-center".