Error with download handler, only with shinyproxy


I’ve a simple R app that produce, via a DownloadHandler, a XLSX file.

When I download it from the app published by Shinyproxy, the XLSX is bigger than the normal and is corrupted (impossible to open it).

I’ve tried the same directly with the Docker Container, and no problem, the XLSX is fine (that’s why I’m sure that is the way is published by ShinyProxy that is not good).

No error or warnings in the logs. Shiny proxy version is 3.0

Do you have an idea ?

Have a nice day.