diff --git a/app/src/main/java/eu/kanade/tachiyomi/extension/installer/Installer.kt b/app/src/main/java/eu/kanade/tachiyomi/extension/installer/Installer.kt
index 3a2200632..645a37d42 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/extension/installer/Installer.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/extension/installer/Installer.kt
@@ -24,7 +24,9 @@ abstract class Installer(private val service: Service) {
     private val extensionManager: ExtensionManager by injectLazy()
 
     private var waitingInstall = AtomicReference<Entry?>(null)
-    private val queue = Collections.synchronizedList(mutableListOf<Entry>())
+    // KMK -->
+    private val queue = Collections.synchronizedSet(mutableSetOf<Entry>())
+    // KMK <--
 
     private val cancelReceiver = object : BroadcastReceiver() {
         override fun onReceive(context: Context, intent: Intent) {
@@ -104,7 +106,9 @@ abstract class Installer(private val service: Service) {
         }
         val nextEntry = queue.first()
         if (waitingInstall.compareAndSet(null, nextEntry)) {
-            queue.removeAt(0)
+            // KMK -->
+            queue.remove(nextEntry)
+            // KMK <--
             processEntry(nextEntry)
         }
     }
@@ -129,7 +133,11 @@ abstract class Installer(private val service: Service) {
      */
     private fun cancelQueue(downloadId: Long) {
         val waitingInstall = this.waitingInstall.load()
-        val toCancel = queue.find { it.downloadId == downloadId } ?: waitingInstall ?: return
+        // KMK -->
+        val toCancel = synchronized(queue) { queue.find { it.downloadId == downloadId } }
+            ?: waitingInstall?.takeIf { it.downloadId == downloadId }
+            // KMK <--
+            ?: return
         if (cancelEntry(toCancel)) {
             queue.remove(toCancel)
             if (waitingInstall == toCancel) {
diff --git a/app/src/main/java/eu/kanade/tachiyomi/extension/installer/PackageInstallerInstaller.kt b/app/src/main/java/eu/kanade/tachiyomi/extension/installer/PackageInstallerInstaller.kt
index e65862330..a3e37a6aa 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/extension/installer/PackageInstallerInstaller.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/extension/installer/PackageInstallerInstaller.kt
@@ -15,8 +15,7 @@ import eu.kanade.tachiyomi.extension.model.InstallStep
 import eu.kanade.tachiyomi.util.lang.use
 import eu.kanade.tachiyomi.util.system.getParcelableExtraCompat
 import eu.kanade.tachiyomi.util.system.getUriSize
-import logcat.LogPriority
-import tachiyomi.core.common.util.system.logcat
+import exh.log.xLogE
 
 class PackageInstallerInstaller(private val service: Service) : Installer(service) {
 
@@ -42,7 +41,7 @@ class PackageInstallerInstaller(private val service: Service) : Installer(servic
                                 .sanitizeByFiltering(this)
                         }
                     if (userAction == null) {
-                        logcat(LogPriority.ERROR) { "Fatal error for $intent" }
+                        xLogE("Fatal error for $intent")
                         continueQueue(InstallStep.Error)
                         return
                     }
@@ -95,7 +94,7 @@ class PackageInstallerInstaller(private val service: Service) : Installer(servic
                 session.commit(intentSender)
             }
         } catch (e: Exception) {
-            logcat(LogPriority.ERROR, e) { "Failed to install extension ${entry.downloadId} ${entry.uri}" }
+            xLogE("Failed to install extension ${entry.downloadId} ${entry.uri}", e)
             activeSession?.let { (_, sessionId) ->
                 packageInstaller.abandonSession(sessionId)
             }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionInstallService.kt b/app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionInstallService.kt
index dab5df61e..f082fe4a1 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionInstallService.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionInstallService.kt
@@ -16,9 +16,8 @@ import eu.kanade.tachiyomi.extension.installer.ShizukuInstaller
 import eu.kanade.tachiyomi.extension.util.ExtensionInstaller.Companion.EXTRA_DOWNLOAD_ID
 import eu.kanade.tachiyomi.util.system.getSerializableExtraCompat
 import eu.kanade.tachiyomi.util.system.notificationBuilder
-import logcat.LogPriority
+import exh.log.xLogE
 import tachiyomi.core.common.i18n.stringResource
-import tachiyomi.core.common.util.system.logcat
 import tachiyomi.i18n.MR
 
 class ExtensionInstallService : Service() {
@@ -53,7 +52,7 @@ class ExtensionInstallService : Service() {
                 BasePreferences.ExtensionInstaller.PACKAGEINSTALLER -> PackageInstallerInstaller(this)
                 BasePreferences.ExtensionInstaller.SHIZUKU -> ShizukuInstaller(this)
                 else -> {
-                    logcat(LogPriority.ERROR) { "Not implemented for installer $installerUsed" }
+                    xLogE("Not implemented for installer $installerUsed")
                     stopSelf()
                     return START_NOT_STICKY
                 }