Broken Pipe in REST POST

Hello all,
we have developed a pipeline which loads a file to SAAS application. For most files this works fine, but larger files error out. We get after 30 sec below error:

Reason: Broken pipe (Write failed)
Resolution: Please check the Snap properties

We are using REST POST . I was wondering if the connection or read timeout has any impact, but changing this does not have any impact. Would anyone know which other property could have an impact?

stefan