Trying to fix a strange issue with the loading when hiding items..

app/build.gradle

@@ -36,11 +36,11 @@ android {
         targetCompatibility JavaVersion.VERSION_1_8
     }
     compileSdkVersion 28
-    buildToolsVersion '28.0.1'
+    buildToolsVersion '28.0.2'
     defaultConfig {
         applicationId "apps.amine.bou.readerforselfoss"
         minSdkVersion 16
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode versionCodeFromGit()
         versionName versionNameFromGit()
 
@@ -66,6 +66,7 @@ android {
             buildConfigField "String", "LOGIN_URL", appLoginUrl
             buildConfigField "String", "LOGIN_USERNAME", appLoginUsername
             buildConfigField "String", "LOGIN_PASSWORD", appLoginPassword
+            applicationIdSuffix ".dev"
         }
     }
     flavorDimensions "build"
@@ -93,13 +94,13 @@ dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     // Android Support
-    implementation 'com.android.support:appcompat-v7:27.1.1'
-    implementation 'com.android.support:design:27.1.1'
-    implementation 'com.android.support:recyclerview-v7:27.1.1'
-    implementation 'com.android.support:support-v4:27.1.1'
-    implementation 'com.android.support:support-vector-drawable:27.1.1'
-    implementation 'com.android.support:customtabs:27.1.1'
-    implementation 'com.android.support:cardview-v7:27.1.1'
+    implementation "com.android.support:appcompat-v7:$android_version"
+    implementation "com.android.support:design:$android_version"
+    implementation "com.android.support:recyclerview-v7:$android_version"
+    implementation "com.android.support:support-v4:$android_version"
+    implementation "com.android.support:support-vector-drawable:$android_version"
+    implementation "com.android.support:customtabs:$android_version"
+    implementation "com.android.support:cardview-v7:$android_version"
     implementation 'com.android.support.constraint:constraint-layout:1.1.0'
 
     //multidex