The most annoying issue I run into lately is that often when trying to place mosaics (i.e., patterns made with the “foundation” block in various colors), the mosaic won’t place in the spot I want it to – I’ll click it to place in one spot and it will “jump” up or down several z-levels, sometimes offscreen into midair or down inside solid rock.
It seems to be very very location specific. I posted with more details about this problem in the prior thread ( [A14/A15] The buildings my hearthling will not build Thread ) but the problem persists in the current alpha (even in new copies of the same seed/map).