Problems exiting video

[DrifterAtSea]

If I click the back button while a video plays, the screen switches from landscape mode to portrait mode, then back to landscape mode and then back to portrait mode and then the list of videos is blank. If I then tap on Android's app selection button (the square icon at the bottom of the phone to the right of the Home button) and then tap it again, the list of videos gets refreshed.

I'm running this on a Nexus 6P with Android 8.1.0.

Top level gradle.build:

buildscript {
    ext.kotlin_version = '1.2.51'
    ext.supportVersion = '26.0.0'
    ext.retrofitVersion = '2.3.0'
    ext.glideVersion = '3.7.0'
    ext.exoPlayerVersion = 'r2.4.4'
    ext.daggerVersion = '2.7'

    repositories {
        maven { url 'https://maven.google.com' }
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        maven { url 'https://maven.google.com' }
        jcenter()
        mavenCentral()
    }
}

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

Project level gradle.build:

//noinspection GradleCompatible
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'

android {
    compileSdkVersion 26
    buildToolsVersion "28.0.3"
    defaultConfig {
        applicationId "com.example.github.videoapp"
        minSdkVersion 15
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        buildConfigField("String", "API_KEY", API_KEY)
        buildConfigField("String", "BASE_URL", BASE_URL)
        buildConfigField("String", "IMG_BASE_URL", IMG_BASE_URL)
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:support-v4:26.0.0'
    androidTestImplementation('com.android.support.test.espresso:espresso-core:3.0.0', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"

    implementation "com.android.support:appcompat-v7:$supportVersion"
    implementation "com.android.support:design:$supportVersion"
    implementation "com.android.support:support-v13:$supportVersion"
    implementation "com.android.support:recyclerview-v7:$supportVersion"
    implementation "com.android.support:support-annotations:$supportVersion"
    implementation "com.android.support:cardview-v7:$supportVersion"

    testImplementation 'junit:junit:4.12'

    implementation 'com.android.support.constraint:constraint-layout:1.0.2'

    implementation "com.squareup.retrofit2:retrofit:$retrofitVersion"
    implementation "com.squareup.retrofit2:converter-gson:$retrofitVersion"

    implementation "com.github.bumptech.glide:glide:$glideVersion"

    //Dagger 2 dependencies
    implementation "com.google.dagger:dagger:$daggerVersion"
    kapt "com.google.dagger:dagger-compiler:$daggerVersion"
    compileOnly 'org.glassfish:javax.annotation:10.0-b28'
}