I haven't had the time to fix the button size issue for phone builds this time around. The next update should have a solution for it, if I find one.
As for your bug report, there is a feature where if you click on a tile that is revealed, it should reveal all of the non-revealed tiles around it if there are enough mines around it. This might be a bug with that feature. I haven't really been able to replicate your bug, so for the time being, so I am not sure what to do to fix it yet.