Step "Deploy files" fail with error "rsync: setpgid: Operation not permitted\n"

The step "Deploy files" from Qt Creator > Projects > Build & Run > Run > Deployment fails with "rsync failed with exit code 14. rsync: setpgid: Operation not permitted" when trying to deploy to remote linux device

I enabled logging (Tools > Debug Qt Creator) and copied the exact rsync command from there.

• Running this command from a terminal works
• creating a custom process step with this command works
• start Qt Creator from terminal -> the step "Deploy files" works

I can fix it by adding " --blocking-io" to the "Flags for rsync"