Hello Heather, and welcome to E-Learning Heroes. 😊
I appreciate you reaching out and sharing what you are experiencing along with a sample .story file.
We do have an open issue specific to multiple drag-over triggers when using multiple layers, so this certainly fits the criteria.
I adjusted the triggers to drop on vs. drag over and the interaction seems to be working as expected. I hope that this fits your need in the meantime and I've attached this conversation to our report.
I wanted to share some information on how we define bugs and how we tackle them when they occur.