Google Play发布后应用异常：R8混淆及release分支问题求助

无法理解为何代码在release分支发布至Google Play后无法正常运行，具体排查过程如下：

• 步骤1：开启minifyEnabled true并配置proguard-rules.pro文件，添加-keep public class myClassName规则保留指定类，本地debug和release构建均正常，但上传至Google Play内部测试分支后应用失效。
• 步骤2：设置minifyEnabled false，上传至内部测试分支后应用恢复正常；将该版本同步至release分支发布后，应用再次失效，表现为仿佛混淆仍在启用，出现变量加密异常、函数参数错误导致崩溃等问题，尽管proguard-rules.pro规则配置无误。
• 步骤3：直接将关闭混淆的版本上传至release分支，问题依旧。

相关配置文件代码 #

<1> app模块build.gradle #

plugins {
    id 'com.android.application'
}

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
// Apply the Crashlytics Gradle plugin
apply plugin: 'com.google.firebase.crashlytics'

repositories {
    mavenCentral()
}

android {
    compileSdkVersion 33
    buildToolsVersion "30.0.3"

    defaultConfig {
        applicationId "com.my.app"
        minSdkVersion 23
        targetSdkVersion 33
        versionCode 40
        versionName "1.0"
        setProperty("archivesBaseName", applicationId + "-v" + versionCode + "(" + versionName + ")")
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
        debug {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    buildFeatures {
        viewBinding true
    }
    packagingOptions {
        resources {
            excludes += ['META-INF/DEPENDENCIES', 'META-INF/LICENSE', 'META-INF/LICENSE.txt', 'META-INF/license.txt', 'META-INF/NOTICE', 'META-INF/NOTICE.txt', 'META-INF/notice.txt', 'META-INF/ASL2.0']
        }
    }
    namespace 'com.my.app'
}

dependencies {
    //firebase auth
    implementation platform('com.google.firebase:firebase-bom:29.1.0')
    implementation 'com.google.firebase:firebase-auth:21.1.0'

    // google
    implementation 'com.google.android.play:core:1.10.3'
    implementation 'com.google.android.gms:play-services-games:23.0.0'
    implementation 'com.google.android.gms:play-services-auth:20.3.0'
    //firebase-crashlytics
    implementation 'com.google.firebase:firebase-crashlytics:18.3.1'
    implementation 'com.google.firebase:firebase-analytics:21.2.0'
    //google billing
    implementation "com.android.billingclient:billing:5.0.0"
    implementation "com.android.volley:volley:1.2.1"
    //default
    implementation 'com.google.code.gson:gson:2.8.9'
    implementation 'com.nex3z:flow-layout:1.3.3'
    implementation 'androidx.recyclerview:recyclerview:1.2.1'
    implementation 'androidx.preference:preference:1.2.0'
    implementation 'androidx.appcompat:appcompat:1.5.1'
    implementation 'com.google.android.material:material:1.7.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    implementation 'org.jetbrains:annotations:16.0.1'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    //JUnit 4 Test
    testImplementation 'org.junit.jupiter:junit-jupiter:5.8.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

    implementation "androidx.lifecycle:lifecycle-viewmodel:2.5.1"
    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.5.1"

}

<2> 根目录build.gradle #

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:7.3.1'
        classpath 'com.google.gms:google-services:4.3.14'
        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.9.2'
        classpath 'com.google.android.libraries.mapsplatform.secrets-gradle-plugin:secrets-gradle-plugin:2.0.1'

    }
}

allprojects {
    repositories {
        mavenCentral()
        google()
    }


task clean(type: Delete) {
    delete rootProject.buildDir
}

<3> proguard-rules.pro #

-keep public class myClassName

内容的提问来源于stack exchange，提问作者user238664