If you have the region names display enabled (Ctrl+Shift+R) and you see an unknown region,
and then send a colonist to that unknown region,
and then discover it,
and then enter a new name for the region,
and then click "Okay",
the region name on the tile is not updated (it still stays at "Unknown Region") until you disable/re-enable the displaying of region names on tiles again, or you move the camera away and then back to the region.
The same applies to unknown rivers, mountains as well.
Version: 0.13.0+dev, commit cb10784763ce2a594dc5333ba83a56e197bc4e19
Disagree. The region name update is delayed but many things cause it to update, including just moving another unit.
What's the point of displaying region names if they are outdated/wrong? If the game shows "Unknown Region" for a region I actually discovered, this doesn't make sense to me.
It is indeed wrong, but temporary. FreeCol is a client-server system. The display does not get updated until the client sends a message to the server accepting the new region name, and the server sends back an update for the tiles that have changed. Until that message arrives, the region naming is unconfirmed and unchanged. Keeping the client and server in sync is VERY important, and the source of many game breaking bugs, whereas a brief display error on the region name is a minor annoyance.