Why is Safari feeling the need to refresh tabs when i switch to them?

[advil0]

Occasionally when I switch to an older tab, Safari just goes ahead and refreshes it, almost as if I were on an iPhone.

This is incredibly stupid. I understand why on the iPhone they do this, but on my Macbook Pro with 8gb of RAM? Why the hell would this happen?

Any ideas on how to disable this?

 

[Frosties]

https://forums.macrumors.com/threads/1197467/

 

[advil0]

Not what I meant, I mean when switching tabs, Safari reloads the tab I'm switching to sometimes. Almost like it's pretending to be an iPhone that's out of RAM.