I have had similar issues. I think they are related to the Epic Launcher, because its connection seems very spotty. Often, when I open Epic Launcher after it sitting for a while minimized on the windows tray, I get just blank black screen with green loading bar at the bottom for infinitely long amount of time. Then I close it, when I reopen it it again loads for about a minute, and then signs me out and wants me to sign in again. Only then, it starts working again. And it appears to me that Datasmith licence is being periodically checked by checking the user account, which is logged in through the launcher, not the actual editor, so if launcher goes down, so does the licence probably.
I am not sure if it’s licensing infrastructure deficiency or some unauthorized login prevention, given how many account theft attempts Epic had to deal with after Fortnite popularity explosion.