Edge dev - How to show icons instead of close tab"x" on vertical tabs?

recently whenever I switch tabs on Edge dev, that tab's icon turns into the close tab button, and won't change back until I expand the vertical tabs.

I find this quite annoying because when I try and switch tabs, I accidentally close it instead because I click an "x" instead of the tab. of course I can just use "shift+tab", but usually I have many tabs, and using shift+tab to scrub through multiple tabs or expanding the vertical tabs than clicking takes too much time.

How do I make it so that the close tab button won't appear?