Editor's background not changed after changing map's background for the second time

[MeerukYang]

Type

Other

Bug description

7.16.mp4

to reproduce, do as in the attached video.

first time changing map's background, editor's changed too; but second time.

Screenshots or videos

No response

Version

2025.711.0-tachyon

Logs

compressed-logs.zip

[Joehuu]

I'll just bundle this bug with #26001 (newly created beatmap doesn't change bg even for the first time).