Something weird is going on (Patreon)

Hey guys, it's only me or horizontal images aren't displaying correctly?

Because when I open one from the previous post it shows resolution of 620x349, when in the reality it should be 3.2k wide (and so do the other ones)

I'm quite concerned now and would love to hear situation from your side. In any case I saw an option for attaching files (probably for further download?) and so we can check it if it turns out that this is a patreon's problem :\