Indeed, there was a bug with determining when to switch to floats, that was fixed by Zoffix in August: https://github.com/rakudo/rakudo/commit/fec1bd74f97e

Indeed, there was a bug with determining when to switch to floats, that was fixed by Zoffix in August: https://github.com/rakudo/rakudo/commit/fec1bd74f97e257d4c88673cd62fdcae39f587a3