Color cycling isn't working for poly plots when input is Vector{Rect2f}

[asinghvi17]

• what version of Makie are you running? (]st -m Makie) master
• can you reproduce the bug with a fresh environment ? (]activate --temp; add Makie) yes
• What platform + GPU are you on? irrelevant

MWE:

f, a, p = poly(Rect2f((2.2, 2.2), (0.6, 0.6)))
p2 = poly!(a, Rect2f((6.2, 4.2), (.6, 1)))
a.title = "p1 rect, p2 rect"

a2, p3 = poly(f[1, 2], [Rect2f((2.2, 2.2), (0.6, 0.6))])
p4 = poly!(a2, Rect2f((6.2, 4.2), (.6, 1)))
a2.title = "p3 vec(rect), p4 rect"
f

Not sure what is going on here! A third poly plot into a2 is green, so cycling seems to be working, just skipped for the first plot somehow...!