Visio 2016 -> Why is container appearing on different layer than what it contains?

The Issue

I'm using Microsoft Visio 2016. I've selected some shapes and I've clicked the "Container" button in the Insert tab. It creates the container, but the container seems to be on a different layer than the shapes. I know this because I have a second layer - Layer B), lets say -- and I have send Layer B) to the back. But, my shapes are on layer A) and the new container I made is appearing behind layer B). This is weird.

My System

• MS Visio 2016 Professional
• Developer mode enabled

Any help is appreciated.