[Aftermathhqt]

Managed to fix this yesterday, thanks Vlad & Phanx!

hooksecurefunc("AuraButton_Update", function(self, index, filter)   
    local ABuffFrame = _G[self..index]
    if not ABuffFrame then return end
 
    ABuffFrame:SetSize(BuffSize, BuffSize)
    A.CreateBorder(ABuffFrame, true, BuffSize, BuffSize)
    
    local ABuffFrameIcon = _G[self..index.."Icon"] 
    ABuffFrameIcon:SetTexCoord(unpack(A.TexCoords))
 
    local BuffStatusBar = ABuffFrame.StatusBar
    if not BuffStatusBar then       
        BuffStatusBar = CreateFrame("StatusBar", nil, ABuffFrame)
        BuffStatusBar:SetSize(BuffSize, 6)
        BuffStatusBar:SetPoint("BOTTOM", ABuffFrame, 0, -9)
        
        BuffStatusBar:SetStatusBarTexture("Interface\\Buttons\\WHITE8x8")
        BuffStatusBar:SetMinMaxValues(0, 1)
        
        BuffStatusBar:SetBackdrop({
            bgFile = "Interface\\Buttons\\WHITE8x8",
            insets = {top = A.Scale(1), left = A.Scale(1), bottom = A.Scale(1), right = A.Scale(1)},
        })
        
        A.CreateBorder(BuffStatusBar)
 
        ABuffFrame.StatusBar = BuffStatusBar
    end
    
    local TimeLeft = 0
    
    BuffStatusBar:SetScript("OnUpdate", function(self, Elapsed)
        TimeLeft = TimeLeft - Elapsed
    
        if (TimeLeft <= 0) then
        
            local Name, Rank, Texture, Count, DType, Duration, ExpirationTime, Caster, IsStealable, IsConsolidate, SpellID, CanApplyAura, IsBossDebuff = UnitAura(ABuffFrame.unit, index, filter)
            if (Duration > 0 and ExpirationTime and not IsConsolidate) then
                local GetDurationTime = GetTime()
                BuffStatusBar:SetValue((ExpirationTime - GetDurationTime) / Duration)
                
                local R, G, B = A.ColorGradient((ExpirationTime - GetDurationTime), Duration, 0.8, 0, 0, 0.8, 0.8, 0, 0, 0.8, 0)
                BuffStatusBar:SetStatusBarColor(R, G, B)
                BuffStatusBar:SetBackdropColor(R*0.5, G*0.5, B*0.5)
            else
                local Min, Max = BuffStatusBar:GetMinMaxValues()
                BuffStatusBar:SetValue(Max)
                BuffStatusBar:SetStatusBarColor(0, 0.8, 0)
            end
            
            TimeLeft = 0.01
        end
    end)
 
    local ABuffFrameDuration = _G[self..index.."Duration"]
    --ABuffFrameDuration:ClearAllPoints()
    --ABuffFrameDuration:SetPoint("BOTTOM", ABuffFrame, "BOTTOM", 1, -15.5)
    --ABuffFrameDuration:SetFont(Font2, 12, "THINOUTLINE")
    --ABuffFrameDuration:SetShadowOffset(1, -1)
    --ABuffFrameDuration:SetShadowColor(0, 0, 0)
    ABuffFrameDuration:SetAlpha(0)
 
    local ABuffFrameCount = _G[self..index.."Count"]
    ABuffFrameCount:ClearAllPoints()
    ABuffFrameCount:SetPoint("BOTTOMRIGHT", ABuffFrame, -1.5, 4)
    ABuffFrameCount:SetFont(Font2, 12.5, "THINOUTLINE")
    ABuffFrameCount:SetShadowOffset(1, -1)
    ABuffFrameCount:SetShadowColor(0, 0, 0)
 
    local ABuffFrameBorder = _G[self..index.."Border"]
    if ABuffFrameBorder then
        ABuffFrameBorder:SetTexture(nil)
        ABuffFrameBorder:Hide()
        
        local R, G, B = ABuffFrameBorder:GetVertexColor()
        A.ColorBorder(ABuffFrame, R, G, B)
        A.ColorBorder(BuffStatusBar, R, G, B)
    end
end)