In Terra Incognita, when absorbing outpost/create new district/etc. , certain exploited tile (features?) would create ice visually. No gameplay changes it seems.
In attached save file, absorb the outpost "Polis" would free the coral reefs exploited, and detaching it would melt the ice.
Another one can be found on upper-right end of territory, attached as 3rd screenshot.
Step by step of the bug
Step 1
Exploit certain featured tile with district (in this save, coral reef with harbor)
Step 2
Absorb this outpost "Polis", and coral reefs are covered with ice
In Terra Incognita, when absorbing outpost/create new district/etc. , certain exploited tile (features?) would create ice visually. No gameplay changes it seems.
In attached save file, absorb the outpost "Polis" would free the coral reefs exploited, and detaching it would melt the ice.
Another one can be found on upper-right end of territory, attached as 3rd screenshot.