I like to use the web interface to view and edit my OsmAnd data. I've noticed the following, which is reproducible:
I have many points in OsmAnd via GPX files. I can also see these points in the web app. But if I select one of them with the mouse, I can no longer pan or zoom the map. The map then keeps jumping back. Only reloading the web app solves the problem. Until I find a similar point again. Then it starts all over again.