Repro steps:
In the Map editor, hit Escape.
Click on Settings.
Click on Other.
Click the Back button in the bottom left.
You will be given a confirmation dialog to abandon unsaved changes, but there have been no changes made.
The top left "Undo" icon also shows "All options have default values."
https://imgur.com/a/HQv2x3J
[0.17.2] Map Editor Settings > Other prompts to save changes with no changes made
Re: [0.17.2] Map Editor Settings > Other prompts to save changes with no changes made
This no longer happens to me in 0.17.3.