The Descombination problem to Idealism is easy to solve.
Consider that there is Consciousness and its Experiences.
It's simple: Consciousness is the Whole and experiences are aspects/parts of this Whole.
There is Consciousness and Experience
Consciousness is the same since you were a child, although everything has changed (from parts of your body to your personality and feelings) the sense of self is the same.
We feel like a Whole with this sense of ME that names its parts as experiences of anger, passion, love...
Consciousness That knows anger, passion and love and not the anger that knows passion and love. These feelings come and go but their foundation remains
This All of the Sense of I that is omnipresent, the same in you and me and even in a dog for it is the Sense of I of the Universe itself as we exist as one.
As if Consciousness were a Field, and the experiences the Excitations of that Field.
Personal minds determined space-time segments of that field or as Kastrup likes to say, eddies in the Ocean.
The Ocean is Consciousness, the whirlpools are experiences. I don't know what you think or feel about us being whirlpools in different regions of space-time with divergent experiences, but the Ocean/Field we inhabit is the same: Consciousness.
Being Minds with a perspective we call Private being also a Perspective of Consciousness, it would simply be a certain variation or folding of a certain segment of experience upon itself, with the sense of I of the Whole of Consciousness remaining the same as ever.