Added parameter variant does not take effect
When you change the variant the value in the schematic editor does not change. In order to view the variant differences you must select the variant-specific sheet, which is selected using the tabs at the bottom of your SchDoc. I don't have one set up at the moment to show you, but hopefully you will be able to find it on your own. Switch to the variant with the modified value for "Load" and the extra tab(s) should appear at the bottom of the pane, next to the "Editor" tab. If it doesn't, after changing the variant close the SchDoc and reopen it, and the tab(s) should appear.

All this is from memory, so hopefully it still works for you. I can look into it again when I get to work tomorrow -- I have various projects with multiple variants.