There is a Mirror activated in the spline Im working on
When I press SOLO, the Mirror is canceled although the button still “on” so I have to press Twice.
When I cancel the solo it goes back to disply the mirrored shape.
I’m not sure I understand your issue.
What is your selection exactly before solo? (just one or both mesh selected)
Newly created object are always shown by solo (otherwise it gets confusing when you add something and nothing happens).
And repeated/mirrored nodes are considered new objects.
Thank you for explain the reasoning behind
For me as a end user, in this case is about see the object.
When added a modifier such as a mirror now and later on a twist, bend etc, it would make more sense to see the end result.
As for now in your plans, I would then turn off the mirror button (darken it) bc it stays “on” just the button.