Hey guys,
Totally my fault this one. I did detect and fix a potentially serious precision issue back in September. Had to wait a few days for my borrowed Nexus to be returned so I could confirm the fix (the only other device I had for testing was an iPad). I completely forgot about it in the meantime, and have been distracted from the forums lately.
I'm sending you a PM with a link to the latest dev build that includes the precision fixes. This will go on the Asset Store as soon as we finish a couple of feature requests.
I apologize for the inconvenience caused and, as Ricardo said, we're ready to cover the refund.