When rotating a blueprint that has an odd size (for example 1x1 or 3x3) the blueprint is shifted by 1 or 2 tiles.
Reproduction scenario:
- Have a burner-inserter and a blueprint in your inventory (for example, start a new game with this mod).
- Select the burner inserter and hover it over the map.
- Rotate the burner inserter 4 times (notice that the burner inserter ghost is centred under your cursor and stays on the same tile).
- Place the burner inserter.
- Create a blueprint of that burner inserter.
- Select the blueprint and hover it over the map.
- Rotate the blueprint 4 times (notice that the burner inserter ghost is not centred under your cursor and shifts 1 or 2 tiles).
Rotating a 1x1-sized blueprint of a single item should behave the same as rotating that single item itself.