The nginx default request body limit of 1 MB is too small for some integration payloads, and the default 60s send/read timeouts can cut off longer sync operations before they finish. Here's what we recommend setting on the proxy:

• client_max_body_size: raise from the 1 MB default to 10 MB, so larger payloads aren't rejected
• Send timeout: raise to 5 minutes (up from 60s)
• Read timeout: raise to 5 minutes (up from 60s)
• Connect timeout: the existing 30s is fine, no change needed

With those in place, the proxy will comfortably handle the integration's payload sizes and the duration longer operations need to complete.