Minimap, overlay map, deficient

The overlay-or-mini map normally shows lines which you cannot walk across. Some abyss or wall or fence or obstacle.
(There is an area in which you can move [no need for jumping] freely. The borders of this area are clearly show on the overlay/mini map. Usually.)

But sometimes not.

For example in this area, the borders are not clearly shown. One may think "here I can go further", but cannot go further.

in the settings menu, there are 2 slider adjustments for how visible the map outline and map items are. adjust it.