My app receives user's uploads at the app's host through the Shopify's proxy.
Recently I've noticed that the uploads fail with "413 Request Entity Too Large" if the file is larger then approx. 1Mb.
Smaller files do fine.
Bigger files do fine if the proxy is not used, and the POST request is sent directly to the app's host. Therefore, the limitation must be in the Shopify's proxy.
I remember well, I've tested the app with large files before, and it worked fine using the proxy.
I don't know when exactly the limitation came into force.
Can this be fixed please?