If put Text into VGroup, no matter what color it is set to，it always turns white in the Write animation.

If put Text into VGroup, no matter what color it is set to，
it always turns white in the Write animation.
It doesn't look good on a white background.
Edition：ManimGL 0.15.0
Code：
t1=Text("A",color=BLUE)
t2=Text("B",color=YELLOW)
t3=Text("C",color=RED)
t4=Text("D",color=BLACK)
t=VGroup(t1,t2,t3,t4).arrange(RIGHT).scale(2)
self.play(Write(t))
self.wait()
Output：

https://user-images.githubusercontent.com/101418800/161295315-4cfc981a-132a-4f0c-aa49-66bc03fd7365.mp4