Factorio Forums

Steps to reproduce:

1. Select ghost cursor for any item not in your inventory (in my case, I did so by clicking on something in the hotbar that I didn't have)
2. Open blueprint library (click or press 'b')
3. Select blueprint (this applies to blueprints both inside and outside of books) (optionally, close the blueprint window)
4. Press 'r' to rotate the blueprint
5. Observe that the blueprint does not rotate
6. Press 'q', which seems to deselect the ghost cursor, not the blueprint
7. Press 'r' to rotate the blueprint, observe that the blueprint now rotates

If you do not perform step 1, then blueprints seem to rotate fine. This seems to specifically be related to having a ghost cursor selected before placing a blueprint.

Thanks for the report, this is fixed for the next release.