iOS device’s volume buttons only control the primary zone

Recent Roon release enable to control primary zone volume from iOS device’s volume buttons.
As mentioned does not support controlling the selected grouped zone but only the primary zone in the group.

This makes this feature most of the time useless since always requires to unlock phone, open Roon app again, select volume icone… then and only then homegeneously manage the volume of the entire group in the app

Is there a plan to correct that in the future?