I'm doing a QGIS course at the moment using QGIS 3.10 on a Windows 10 Pro 64bit system at the moment.
Settings are default, except for the "filter invalid geometries" option is set to "ignore".
With a shape selected and editing+vertex tool active, I can select a single vertex (shift+click) and edit or delete it. I can also select all vertices on a line by pressing
shift+r and then selecting the first and last vertex.
I cannot, however, select multiple vertices by dragging a box. I have tried for 2 hours now, and I just don't get why it doesn't work. Has anyone else seen this problem with QGIS 3.10, and has anyone solved it?