Sometimes it does and sometimes it doesn't. I have had brushes that I wash twice and then it stops, and I have had brushes that never stopped leaking dye.
I have had this happen with MAC brushes too.. blue leaks out and stains the goat hairs. I think this is only evident in the white goat hair brushes! And yes, it does go away.
I've had color bleed out of brushes and it's just a minor annoyance that sometimes happens. Some brands are more prone to it than others and each brush will bleed for different wash amounts.
oh yeah even MAC brushes do that ?
'cause i got paranoid thinking when i use them with my liquid products maybe some gets mixed in and then i put that on my face