Cannot attach images larger than a certain size

I can't seem to attach images I've taken on my phone at full resolution to Hachyderm. I have previously been able to. Full resolution images can be from 1-5 MiB, and I've been able to upload them just fine (and it seems like they are recompressed/downscaled on the server). But now if I try to upload images larger than 1 MiB (or so, I can upload ones smaller than 1 MiB and have failed on 1.8 MiB images, not sure exactly where the cutoff is), I get a 502 Bad Gateway error or a 413 Request Entity Too Large error. <img width="507" height="1414" alt="Image" src="https://github.com/user-attachments/assets/dcf24df2-9ff7-439a-b057-ddfa50f1deb0" /> I've even tried uploading an image I know I have successfully uploaded in the past, so I think a setting has changed somewhere, or I've been directed to a proxy with different settings or something.