I am using AutoCAD 2019. I have loaded a map service hosted by my university. I can see the map. I attempt to draw a line (or pline or arc....) following an entity on the map (e.g. a building). I pick the first point and then as soon as it is time to select the 2nd point, the map disappears. I have to complete the command and pan before the map re-appears. I have toggled the Graphics hardware acceleration on and off, with no changes. Graphics card is also up to date. Any ideas on what is causing this and, even better, how to solve the problem? Thanks.