Across several games I've encountered a bug where the map gets 'stuck' and panning around no longer works. Zooming in and out often seems to stop working properly at this point, just changing the zoom level at which the map is stuck and sometimes making deadspace appear around the map where there shouldn't be any (the grey space that would be there when the map dimensions are smaller that the screen). This has happened to other people I play with as well, and seems particularly prone to happening when zooming in and out, but I can't reproduce it.