Searching for solutions from this kind of happenings, finally found myself a (weird Frankenstein) installed system from the today’s’ Ubuntu Eoan. It doesn’t have Gnome’s default top left hot corner, just like Ubuntu. It doesn’t have the Show Applications button, but shows the App-grid. It doesn’t have the Activities button, but shows the Overview. It doesn’t have C. Soriano’s Desktop Icons extension (system), nor the Rastersoft’s Desktop Icons NG extension, but still shows desktop icons and has drag and drop.
(Using Dash to Panel for usefulness, btw.)
Absolute weirdness!
Ah, I forgot. I close my case.