It has to do with a bug in trusts and vertical elevations. In some instances, trusts like Apururu will not detect anything if you're on a different elevation than her.
I first noticed it soloing the avatar high-tier mission fights and have since noticed it alot in Reisenjima because of all the hill sides. You may also notice that trusts like Apururu won't run away like normal during battles and be right next to you. This means they are not detecting you properly.
To fix this, start moving yourself closer to your mage trusts in relative elevation and they should start curing again.
There are a bunch of bugs like this related to being on a hill. I remember when I first popped that MNK orc NM for the Sandy missions years ago, the NM ran away from me over the mountains and out of sight. I had to run all the way back through the sewers to get to the ??? again.
Recently, I popped a Ascendant Raaz on a hillside in Reisenjima and it too, ran away from me like the orc from years ago and never came back.