Imported materials does not save after restarting painter

[Psion P 0]

I tried to import base materials from substaince source in new library. It imported ok, but some materials won't stay in library after restarting. For example spray_paint_tag stays in library when puff_glitter_print i need to add every time i launch painter.
I add them in same library with same settings, but one stays and other don't. Am i doing something wrong or it is bug?

[Psion P 0]

So it is a bug. I set my new library as default and all starter materials disappeared in next launch. I have to delete my custom library and push ok. Painter return starter materials. Then i again add my custom library and paiter add materials from that library.
This algorithm i need to do every launch.