gdl custom object snaps back to older version upon opening the file

[DOWA]

Hi,
I`ve started making custom objects for a complex project with gdl scripts.
I made a separate pln file for these objects. One of these objects were not saved as a .gsm, it existed only in this pln file.
I see the file was saved. The gdl object was also saved. (custom 3d cabinet)
But when I reopen the file it goes back to an older version of that gdl object.
In 3D window the new version is visible for a second, and then it snaps back to an older version. (In the Library it also shows the older version - date)
If a collage opens it on another pc from our server, only the old version is visible.
Is there anything I can do about it?
Do I always have to save everything as gsm files to avoid this? 

Operating system used: Windows 11

[Lingwisyer]

One of these objects were not saved as a .gsm, it existed only in this pln file.

Do you mean it is only saved in the file Embedded Library? Should try to avoid this.

Might there be another version of the object saved in a different library that is also loaded?

Ling.