@neil Once again thank you for this plugin - this single component is a make-it-or-break-it feature for our community that runs without any other funding.
I have been running AdSense banners with the Responsive setting ever since this feature was introduced to the plugin. Recently however the Responsive ads have started misbehaving – I seem to be getting larger ad units that break the intended UX (too much ad content above the fold). I also get ads that are too big for my iPhone SE – they produce a large white space on the screen unless I turn the device landscape.
I had a look at the settings and noticed that ad size is now a multi-select option. I tried searching here but I failed to find information how does this multi-select feature actually work – what ad sizes are shown and when if I choose more than one?