I've created a mobile map package through Pro and uploaded it to AGOL. I shared it with a group that has edit permissions. When they load it into Field Maps, the intent is for them to add markup and later upload said markup back to AGOL. However, they are unable to edit the markup they make on the mmpk (they can edit markup on other maps). As the creator of the mmpk, I can edit my own markup.
What am I missing?