From what I’m seeing, the image itself is just 128x128. I don’t use those clients, but it looks like they would render any square image that way (taking up a lot of space). Looks like a client problem, not OPs problem maybe?

Another question is whether these images are useful at all, regardless of client and network. These are just text posts…

on both the Friday and Saturday Community posts, I’ve switched to using a smaller image for those posts-- however, on the mobile apps, it’s still the same size, now just a terrible resolution as the mobile apps expand the image to fill the space regardless of the image’s resolution.