Lazy Load off not working

I'm not sure whether I misunderstand something, but I'm setup to remember the last session.

Even if I uncheck the Lazy Load option, the background tabs never load, it seems checking or unchecking basically doesn't change anything at all. Am I missing something about what it's supposed to do?

Using Vivaldi 7.3.3635.9 (Stable channel) (64-bit) and Win 11