Second child container resize issue

Hi there,

This seems like a strange issue and is a little hard to verbally describe but I have a main container and within that container, I have 2 sub-containers. Within those I have 2 elements. The issue is that when I resize my window, the elements in the first inner-container resize at the same rate. But the second inner container, the left item shrinks and the right stays the same. The second is a duplicate of the first so there are no differences in layout, sizing, etc. If I add a third container by duplicating, the second still resizes with this strange behaviour but the first and third do not. I don’t know if this is user error or some strange glitch.

https://drive.google.com/file/d/1TMHxiHtNzoYOEFcgXLUmjlN9QnYN6G-q/view?usp=sharing