I think i see what you mean - if you see my other issues post about scaling - there is some funky interworking between gain and automation appearance in 10.5.20 it would seem.
On the original track the darker effective volume curve (which is the combination of the VCA and actual channel gain for the track) is really useful - just so you can get a feel for the actual track output level. HOWEVER I would expect the original channels gain input be reflected in the controller fader - ie WITHOUT the VCA impact. Likewise, on the VCA automation you only see the gain set for the VCA in your controller.
This doesn’t seem to be how it is at the moment - plus there are some really weird scaling effects when you re-record volume automation on a VCA controlled track. Which seems to then stick in the presentation of the track… would also be interested in a workaround but I’m not sure there is one.
As far as I can tell though, the actual gain produced in the actual audio output is correct…
May not answer your direct question - but you are not alone.