UUID of bitcode enabled app does not have dSYM available for download

I submitted MyApp with bitcode enabled app to TestFlight. I received a crash report where the binary UUID does match the UUIDs listed in the MyApp.app/MyApp or MyApp.app.dSYM that was built on my machine. I tried using the "Download dSYMs..." option in Xcode but still there is no dSYM downloaded that matches the UUID of the binary in the crash report. All other dSYMs are downloaded, however.

Why isn't the dSYM for the binary that Apple built available?

dwarfdump --uuid MyApp.app/MyApp

UUID: 0BDA6D6F-3C0D-339E-842F-C2CB04199E10 (armv7) MyApp.app/MyApp

UUID: B2A69BEC-DF5E-33EA-A9E0-490EBF03074C (arm64) MyApp.app/MyApp

dwarfdump --uuid MyApp.app.dSYM

UUID: 0BDA6D6F-3C0D-339E-842F-C2CB04199E10 (armv7) MyApp.app.dSYM/Contents/Resources/DWARF/MyApp

UUID: B2A69BEC-DF5E-33EA-A9E0-490EBF03074C (arm64) MyApp.app.dSYM/Contents/Resources/DWARF/MyApp

# Why is the the dSYM for this binary not being downloaded?

0x100054000 - 0x1000fffff myapp arm64 <3715db2438743cf5aac1742d9a214c2c> /var/mobile/Containers/Bundle/Application/7313BC02-3F90-4F94-82E2-CBDC941E5D68/MyApp.app/myapp

# The dSYM for this IS being downloaded

0x100144000 - 0x1001e7fff AWSCore arm64 <c2aa13236d0437b98194c0487db69e68> /var/mobile/Containers/Bundle/Application/7313BC02-3F90-4F94-82E2-CBDC941E5D68/blink.app/Frameworks/AWSCore.framework/AWSCore