Alberto knot (modified albright) failing on cast

[MichaelAngelo]

This knot comes heavily recommended by a few experienced members of various fishing forums. It really is a gorgeous knot (very small profile), and I loved tying it.  

Well so far this year I've had that connection slip on me three times while casting, resulting in the flurocarbon leader and lure sailing into oblivion.  What I am left with is an empty braid knot that the flurocarbon just slipped out of.  

I did some googleing about it, and apparently this knot can be prone to fail when casting.  I'm not sure why.  

Anybody else have this experience happen to them?

I'm using uni to uni for now until I find an alternative.  That sucker doesn't slip!  Tried and true