I can imagine this can be some caching problem and not really data disappareaing. I would be curious if you log out and log in if you see the "PCS" still empty or not. Can you check?
Nevertheless, I would recommend to open support ticket via Submit a Customer Service or Technical Support Ticket - SolarWinds for this.
I think you're right. I just checked and the column in the Asset view is now populated. Perhaps just got too anxious and didn't try the obvious. Thanks for your help!