“Opacity (0 to 100)” animation doesn’t work as expected

Hi. Just installed your plugin, and under Animation Settings / Animation Type, the “Opacity (0 to 100)” option animates the menu transition from left to right – exactly the same as the “From Left to Right” option. I would have expected the menu simply to fade in, which is the effect I’m looking for.

Is that expected behaviour, or is there anything I should try to rectify the issue? I’ve had a look at the plugin code and nothing jumps out.

Thanks