box snapping shut when trying to change size

Hi Kevon,
I left a note on your YouTube channel on the video

How to 3D Model a Hinged Box for 3D Printing

https://youtu.be/iSBsBTMsGTk yesterday about my box snapping shut whenever I try to change the sizing and you asked me to share the file with you here. Here's the link https://a360.co/2M7f3ds Very curious to know what's going on here. 🤔
Alex