Hello
Try to press keyboard "End" to reach end of the chart. Sometimes also use double click to any footprint place to start scrolling. But it should scrolling normally.
Press F5 to restore to default size and resize it manually.
Maximize option uses MT internal requests to get chart coordinates, so it is not only footprint issue. But I will be ready if you give me some time to work on your computer via TeamViewer to resolve this issue.
p.s. Please send me replies to denis@clusterdelta.com to get fast response.