[0.18.38] Left clicking on a blueprint and placing into inventory removes print from book

[Ichbinderkuli]

So I fired up Factorio this morning and I discovered that when selecting a blueprint from a blueprint book with the "left click" to build, and I decide to place that blueprint into my inventory, or on my hotbar, the game no longer places a copy from the blueprint book into inventory/hotbar. It isntead takes the ACTUAL blueprint out of the book and places it into inventory/hotbar.

This is a vastly different behavior and I do not believe this is intended. If someone were to delete the prints in inventory/hotbar. they are GONE. I did not experience this issue last night on 0.18.37.

I don't have a crash/bug report, and I can reproduce this in any save game I have, so I believe it will transfer without me uploading a save.

[Ichbinderkuli]

Actually I was mistaken, I found 2 prints from last night on 0.18.37 that were missing from the blueprint books.