I have a context created on desktop named &CNDF which originally synced fine to Android.
Then within the last week I renamed it to &ECF on desktop. The renaming is not carrying through on Android.
I mention the "&" in particular because I have earlier reported a cosmetic bug where the "&" is omitted on the screen in desktop on the picklist when right-clicking on context field in the list view.
So I am suspecting this is a factor. I have tested rename on another tag without "&" and it syncs fine.