When the game is paused, scrolling the screen by pushing the mouse towards a screen edge doesn't work.
I can confirm this. It's happening on the latest exp version.
This is only happening if you use the high-quality minimap. If you get back to the basic one, you may again scroll even when pausing.
Confirmed that I can reproduce this bug, a bit confused as to how it would've arose though, but I will look into it.
I haven't looked at the code relating to this yet (beyond narrowing down to a few commits that could've caused it based on which versions do or don't show this issue), but I have noticed: Internally, the screen scrolling *does* happen; the updated copy of the screen isn't actually output correctly. If you do something that would cause the screen to be redrawn (such as mouseovering a lemming - which can be tricky given that they won't be displayed in their correct positions until the screen is redrawn), the scrolling will show at the correct position.
Fixed for next update.