What I’m showing here is a series of colour-picker values from the two areas shown on the image.
The first pair is without exposure and filmic; the 2nd is with exposure raised; the third with filmic v6 (reset to defaults):
As you can see, the H values were restored by filmic (rounding to the closest integer, 30 and 36 became 32, 59 after exposure, and 31, 35 after filmic), and saturation was dropped.
LCh tells a different story, though:
The darker tone started from h=70 and went to 73 after exposure, then back to 71 after filmic. The brighter one, however, went from 77 to 97; I guess that was clipping, showing the ‘rat-piss yellow’:
With filmic enabled, the darker tone went from 73 to 71, but the brighter one fell to 68 (using max RGB).
Setting chroma preservation to no puts it at 66, luminance Y to 62, power norm to 67, Eucledian norm to 62, legacy Eucledian to 70:
Adjusting the white relative exposure to retain the highlights:
Maybe this (all but legacy Eucledian norm shifting the hue) would be worth reporting as an issue.