Flexbox’s flex-shrink isn’t working with Chrome DevTools Device Mode while testing page

While learning how to use flexbox and working with flex-shrink. I'm noticing that it's not working when you're using Chrome devtools toolbar.

Both screenshots are using 534x821 resolution.

Using - Chrome Devtools

Not Using - Chrome Devtools

I primarily use Chrome DevTools to do testing for changes in my workflow. Does anyone know why this isn't working? Is this just a limitation to Chrome that hasn't been patched yet?

For context, I am using the latest version of Chrome on a 15.4" MacBook Pro.

Thanks and looking forward to learning how this process works!