[GlassStarz]

Sounds like a daisy
They are caused by resin pressured into the pv layer around the break. You will get them when glass is hot more often than not I have noticed when you use a thin resin when its hot you see this more often. The way I avoid a daiy is wipe the ouside of the glass with a alcohol solution to bring the temp down go slow with the pressure when filling rathe rthan trying to hurry things. For myself I like a thicker resin when its hot
Other times a Daisy will appear when to much pressure is used
The other thing it could be is you just didnt fill long enough and when the resin cures it left a air ring on the outside of the break I like to pressure cure and find this eliminates the ring