Spells: Songs breaking if they fade directly after recast

[Jete]

Bard songs will fade if the song "breaks" even if it is recasted. For example.

I cast hymn of restoration ( should last 4 ticks or 12 seconds )
I wait 8.2 seconds ( 3.2 seconds left on Hymn of restoration buff )
The new Hymn of restoration hits and shows in the buff bar.
The old Hymn of restoration fades at almost the exact same time. ( Your wounds stop healing )
The new Hymn of restoration fades. ( lasted about .2 seconds as a buff)