@johnpoz Yeah, I noticed. Originally I didn't save it directly on the forum because of the 2MB limit. But I tell you, I fixed it on the server adding a white background and flattening the PNG. Maybe you weren't getting it because Cloudflare caches things requested frequently--or maybe the browser, Chromium-based browsers in my case are always seem to be ignoring stuff, for instance: I cannot log in with smart cards to vCenter because it wouldn't kill the session while other browsers do. It would've eventually updated itself.
I was already getting it with the white background.
Thanks anyway, I won't post transparencies again, lesson learned.