For some reason some images are not loading for me and some thumbnails, especially recent posts, aren't loading either when I go to the main list. Not sure if it's the server or just me. It seems to be random, not sure why. Anyone else experiencing this?

Same here, TTFB 10-15s and sometimes 522 instead of the image.
Happens with older images as well.

Long loading times and sometimes the image or thumbnail just breaks and gives me a broken image. Refreshing only helps sometimes. Weird...