Using ACES and whites don't equal whites.

Hi all,

See attached AE file. The project settings are using ACES. However, the two comps in this project treat white differently, and I am using the same display transforms. I have noticed that comps will randomly  start interpretting FFFFFF hex values incorrectly. Currently the only workaround that I am aware of is to duplicate the comp that works. I don't know what triggers this bad result to happen. Any advice?

Thanks,

John