I鈥檓 using AppCenter iOS Deploy step (id: appcenter-deploy-ios, version: 2.2.1). It is failing to upload dSYM zip larger than 256 MB.
Seems like it is the same issue: Uploading dsym fails with "Faraday::ConnectionFailed" 路 Issue #93 路 microsoft/fastlane-plugin-appcenter 路 GitHub
No issues if upload dSYM with AppCenter CLI