NLA track disappears

I have these Animation Actions, I click push down, they appear as NLA tracks, I save then exit the file and when I go back they are not there?
I can push them down again, but that’s really annoying.
I’m really puzzled here…Any clues ?
Before


After

I got it, can’t make those in Library Override files, if someone needed it too. Just need to bake and export on one go