When I work on a polygonal layer, I turn on 'Topological Editing' from the snapping toolbar, which allows moving the nodes from adjacent polygons together.
Everything works fine until I add any underlay from the QuickMapServices plugin - Google maps, OSM etc.
After any such layer is added, only individual vertices are selected. So, in order to move a node I have to move individual vertices from neighbouring polygons. The 'topological editing' button is still 'pressed' - no changes in the snapping toolbar.
The problem persists even when I remove the underlay.
How can I keep Topological Editing functional with the google/osm map enabled?