^^I use the alberto as well. The only time it failed me was when I did not have the tag end going out the same way it came in.

i tried a variety of braid-to-fluorocarbon connection knots and had failures with all of them until i started using the alberto knot. it is absolutely critical that the tag in goes out in the same direction that it came in but, once you have it tied correctly, your problems should go away.

I use Power pro and Yo-Zuri hybrid for the leader. Occasionally had the same problem. Found that cinching both ends down snug, then really snugging up the braid end solved the problem for me. Not to be redundant and Im sure you know this but it is essential that the line goes in and comes out of the loop the same way. Give it a good yank and good strong pull after tying to test it out before fishing. Better to re-tie than lose a fish on the hookset.

On Jose Wejebe's video he does not run the line thru the loop to start the alberto.  He places it underneath the loop then makes his wraps and runs the tag thru the loop to compete the knot before cinching.  I have done the knot both ways with the end result being the same.