Yeah for whatever reason, uBlock blocks a lot of forum images. I usually disable my ad blocker and reload the page if I want to see user-uploaded images on most forums. If it is hosted on other sites (ie. imgur or tapatalk) the images show up fine.
Also ad blockers also interfere with some of the site's functionality such as hover over menus (ie. 'Forums' or 'New Posts' dropdowns from nav bar, dropdown under 'Notifications') and the ability to click on some links (most notably, 'Post Quick Reply').
I use Chrome as well, noticed this for 2 weeks and kept ads on for this site for a couple of days, but the ads that are shown on here are resource heavy, so now I only turn off the ad blocker if I want to see someone's uploaded images.