When creating a new world, the loading screen will get stuck at 100%. At this point there is no way to close the game other than by using task manager to end task. This effects version 1.16 but I have experienced it in lower versions. This may be marked as a duplicate of this post: MC-145002 but it has not been fixed despite being flagged as such, and I did not have the plugin BlingEdit installed.

Edit: This is the launcher log after the issue has occurred. However, following the instructions of keeping the launcher log open results in a different outcome (or perhaps it's just chance). Before, the loading screen would get to 100% and just freeze. This time, it got to 100% and the game crashed. https://paste.ubuntu.com/p/2czqQPWmyM/