Spells: Bard Invis song not working properly after patch

[Acrux Bcrux]

Bard invis song is having issues after the recent patch. You cast the song and it will invis you fine, but as you leave it playing, the next 3 ticks of the song will not land on you and you receive the message "You tried to cast an invisibility spell on you, but you are already invisible". The song itself then wears off of you in its 12 second duration and the next tick of the song will reinvis you rather than hitting you every tick of the song and keeping you invisible.