[Bug]: Console message "map successfully saved" appears before save actually completes

[DefinitelyNotRau117]

Version of OpenTTD

14.0-RC3, windows 10

Expected result

«saving map» message remains until the saving is completed
«map successfully saved» appears only after the actual completion of the save

Actual result

The message «map successfully saved» appears right after the command, while the Zzz icon and « * * SAVING GAME * * » are still visible

Steps to reproduce

1. Load a map whose saving time will be quite long (for example 4k² with trees)
2. Open console and enter save , press enter