Desync report attached.
I probably have over 100 hours in this save that was started during the 0.18.xx branch, so it isn't that old of a save. This is also the first time this has happened.
Hope some of this information helps! Thanks for making a great game!
Desync Report: https://www.dropbox.com/s/q0vcuzn5ffenj ... 4.zip?dl=1
As a quick follow up: everytime I try to open that blueprint book now, I get a desync

Follow up #2: After some additional testing, this desync occurred every time I tried to "left click" that BP book in my hotbar.
The eventual "fix" was to restart our dedicated server.
One thing of note: Before I tried to restart the server, I had removed the latest blueprint that would never download properly (I had imported it from the web). It was one of those serpentine rail waiting areas for a train station.