https://umap.openstreetmap.fr/en/map/montenegro-ethnic-map-of-2011-census_1181574#9/42.758105/19.138184

It happens on all maps. It's been happening since an update a few weeks ago. It's easily reproducible.

Previously you needed to press on the layer to list the data. This was better since I do not need all the data from all the layers all the time. If I ignore it and move forward with data being displayed, it slows the browser immensely.

Thank you for your help!