I've seen that a couple times.
I had a sativa hybrid that was casually made outside via mother nature, and that plant had half of the sunleaves a pale white type color, and half of the leaves were normal green. It grew perfectly fine, no other issues, but had that weird genetic anomaly, I got almost a kg from that plant, ended up about 4m high. The buds weren't anything special, but EVERY sun leaf had that, each finger was half whitish/super pale green, also had 13-15 fingers on that girl. Crazy sativas, was a bitch to trim