Crashlytics reports show "Missing BuildId" instead of symbols in the call stack

[VioletGiraffe]

Hi, I'm at my wit's end as I've seemingly checked and re-checked everything, but still I get no symbols (nor addresses) in the call stack (lib_native.so is my library):

This started happening some 6-12 months ago, I didn't exactly notice when. Before that it used to work fine. I have re-read the docs and re-done all the setup steps for integrating Crashlytics into my Gradle + Cmake project with a native library.

I have this, of course:

firebaseCrashlytics {
    nativeSymbolUploadEnabled true
}

and I call ./gradlew uploadCrashlyticsSymbolFileRelease which returns no errors and takes a while to complete, so it's doing something.

Here is the crashlytic package version, the latest for all I know:

    implementation(platform("com.google.firebase:firebase-bom:33.1.2"))
    implementation 'com.google.firebase:firebase-crashlytics-ndk'
    implementation 'com.google.firebase:firebase-analytics'

I also added this to the root-level CmakeLists.txt: link_libraries("-Wl,--build-id")

Any tips on what could be causing this, what I might be missing?