Weakauras and Stagger Help!

Hi! Since the patch 5.1 my Stagger configuration in Weakauras went crazy, and it doesn't show me the ammount of Stagger damage anymore. I've read somewhere that something changed in the way custom functions should be called.

The purpose of this WA string is to show me the bar, the icon, color and amount of stagger damage i'm currently taking.

The next 3 custom functions were working 100% before the 5.1 patch.
I've 3 separate custom functions within the Stagger Group :

Light Stagger:

function() local stagger = select(14, UnitAura("player", "light stagger", nil, "HARMFUL")); return stagger; end

Moderate Stagger:

function() local stagger = select(14, UnitAura("player", "moderate stagger", nil, "HARMFUL")); return stagger; end

Heavy Stagger:

function() local stagger = select(14, UnitAura("player", "heavy stagger", nil, "HARMFUL")); return stagger; end

At this moment this only shows me the Color, Bar and Icon but I can't seem to find what to change to have the Stagger amount to be displayed again!

Can someone help me, please?

Thank you so much and sorry about my English!

Here is the full WA export:

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