[1.0.1956] sometimes blueprints don't rotate with middle-click

[arl85]

In previous builds (B18 and earlier) it was possible to rotate items blueprint while building pressing middle mouse button.
In 1.0.1956 clicking middle mouse to rotate the blueprint doesn't always work.
If not found a steady way to reproduce it but most of the time if I middle-click nothing happens and I'm forced to middle-click twice in rapid succession (double middle-click); in that case object rotates.

double middle click always work, but I suppose that also a single middle click should work; indeed sometimes it works, but most of the time no luck.

I first noticed it when trying to rotate crafting spot but it seems to happen with every object.

Did anyone else notice this behavior?

(windows, 64 bit build)