In Portal 11.3, we have a web map that is shared with four groups that limit access to people who are trained in editing.

We added two web layers to this map that are shared with Organization. When we tried to save the web map, we were prevented from doing so because the layers were not explicitly shared with the same groups as the web map.

My suggestion is that Portal should consider items shared with an entire organization as equivalent to being shared with groups.
For clarity, we do not want to share these layers with Everyone (e.g. make them public).