This is a very minor problem I accidentally found. In campaign map when I zoomed in on the minimap I realized that the minimap does not match the coordinates of currently viewed campaign map. However tooltip when hovering over the minimap still shows the correct region.
As seen in the screenshot, while the campaign map is in Lougiones region, the minimap red square is in Britain instead, although the tooltip correctly says the region name. Clicking the minimap also teleport to incorrect place in campaign map. I exited the game and on reloading the save the bug is no longer shown. Apparently this is intermittent though, I haven't been able to replicate the bug.