Here’s what “alpha” means to me: Not yet “feature complete”. Also, buggy.
I’ve spent nearly all afternoon trying to reproduce the “phantom stones” issue. Stones that appear, after a Living group is removed from the board, hanging in the middle of nowhere. When you try and set something down on them, it’s as if they’re not even there. Great fun.
I did finally reproduce it, and have some small amount of further information, but no idea why it happened in this particular instance and not the dozens of times I had captured living stones in the same game before.
Long story short, if you experience this particular bug, and you think you might know why, or how to reproduce it reliably, please leave a comment below.