Thumbnails not generated automatically during library scan

Server Version#: 1.40.4.8679 x64 on Windows Server 2022
Player Version#: N/A
thumbnails not generated automatically during library scan. I already set thumbnails to be generated immediately when media is added and scanned in library.
This behavior start after I update to this version.

As the previous topic was WRONGLY CLOSED by admin here → Thumbnails not generated automatically during library scan
← Not related at all! Not any parts, not wrongly created. Please read carefully. It doesn’t want to start generating them on newly added media. I have to first scan library and the analyze the media and finally then it start generating the thumbnails.

I’m opening new!

This topic is precisely about this issue. And it has been filed as a bug already.