[ToME 1.5.10] The game starts with a vault character instead

[BugReporter]

Short description.
The game starts with a vault character instead of the one you created.
Actual result.
The game starts with a vault character instead of the one you created in Character Creation window.
Expected result.
The game starts with the character you created in Character Creation window.
Steps to reproduce.
1. Create a character (example: a ghoul Sun Paladin named VaultCharacter).
2. Press ESC to open Game Menu and select Main Menu. Confirm.
3. Start a new game.
4. In Character Creation window select Load Premade.
5. Select VaultCharacter then Load.
6. In Overwrite Character? window select no.
7. Create a character (example: a yeek Summoner, optionally change the name to NewCharacter).
Game version.
1.5.10 for windows from ToME site.
Comment.
N/A.