BUG: Running imported snapshot changing layer linetype

I have set of 50 files with identical layers, linetypes, dimensions etc.
I have created snapshot in the first one and I am importing it into other files.
Partial restore brings all elements I need but, at the same time, is changing linetype properties for some layers. Can’t explain it, they not even identical to the first file.

  1. Layers in the first file

  2. Layers in every other file, before running partial update

  3. Layers after running partial update (first layer is meant to be off)

Crazy thing: it’s not always continuous, sometimes all dashed.
If I run partial update in the first file - it will also mess with linetype styles.
Today’s RC.