diff --git a/lib/controllers/prepare-controller.ts b/lib/controllers/prepare-controller.ts
index 29b9be2b2a..65806d30a7 100644
--- a/lib/controllers/prepare-controller.ts
+++ b/lib/controllers/prepare-controller.ts
@@ -1,4 +1,3 @@
-import * as child_process from "child_process";
 import * as choki from "chokidar";
 import { hook } from "../common/helpers";
 import { performanceLog } from "../common/decorators";
@@ -7,7 +6,7 @@ import * as path from "path";
 import { PREPARE_READY_EVENT_NAME, WEBPACK_COMPILATION_COMPLETE, PACKAGE_JSON_FILE_NAME, PLATFORMS_DIR_NAME } from "../constants";
 
 interface IPlatformWatcherData {
-	webpackCompilerProcess: child_process.ChildProcess;
+	hasWebpackCompilerProcess: boolean;
 	nativeFilesWatcher: choki.FSWatcher;
 }
 
@@ -63,9 +62,9 @@ export class PrepareController extends EventEmitter {
 			this.watchersData[projectDir][platformLowerCase].nativeFilesWatcher = null;
 		}
 
-		if (this.watchersData && this.watchersData[projectDir] && this.watchersData[projectDir][platformLowerCase] && this.watchersData[projectDir][platformLowerCase].webpackCompilerProcess) {
+		if (this.watchersData && this.watchersData[projectDir] && this.watchersData[projectDir][platformLowerCase] && this.watchersData[projectDir][platformLowerCase].hasWebpackCompilerProcess) {
 			await this.$webpackCompilerService.stopWebpackCompiler(platform);
-			this.watchersData[projectDir][platformLowerCase].webpackCompilerProcess = null;
+			this.watchersData[projectDir][platformLowerCase].hasWebpackCompilerProcess = false;
 		}
 	}
 
@@ -78,38 +77,39 @@ export class PrepareController extends EventEmitter {
 		if (!this.watchersData[projectData.projectDir][platformData.platformNameLowerCase]) {
 			this.watchersData[projectData.projectDir][platformData.platformNameLowerCase] = {
 				nativeFilesWatcher: null,
-				webpackCompilerProcess: null
+				hasWebpackCompilerProcess: false
 			};
-			await this.startJSWatcherWithPrepare(platformData, projectData, prepareData); // -> start watcher + initial compilation
-			const hasNativeChanges = await this.startNativeWatcherWithPrepare(platformData, projectData, prepareData); // -> start watcher + initial prepare
-			const result = { platform: platformData.platformNameLowerCase, hasNativeChanges };
+		}
 
-			const hasPersistedDataWithNativeChanges = this.persistedData.find(data => data.platform === result.platform && data.hasNativeChanges);
-			if (hasPersistedDataWithNativeChanges) {
-				result.hasNativeChanges = true;
-			}
+		await this.startJSWatcherWithPrepare(platformData, projectData, prepareData); // -> start watcher + initial compilation
+		const hasNativeChanges = await this.startNativeWatcherWithPrepare(platformData, projectData, prepareData); // -> start watcher + initial prepare
+		const result = { platform: platformData.platformNameLowerCase, hasNativeChanges };
 
-			// TODO: Do not persist this in `this` context. Also it should be per platform.
-			this.isInitialPrepareReady = true;
+		const hasPersistedDataWithNativeChanges = this.persistedData.find(data => data.platform === result.platform && data.hasNativeChanges);
+		if (hasPersistedDataWithNativeChanges) {
+			result.hasNativeChanges = true;
+		}
 
-			if (this.persistedData && this.persistedData.length) {
-				this.emitPrepareEvent({ files: [], hasOnlyHotUpdateFiles: false, hasNativeChanges: result.hasNativeChanges, hmrData: null, platform: platformData.platformNameLowerCase });
-			}
+		// TODO: Do not persist this in `this` context. Also it should be per platform.
+		this.isInitialPrepareReady = true;
 
-			return result;
+		if (this.persistedData && this.persistedData.length) {
+			this.emitPrepareEvent({ files: [], hasOnlyHotUpdateFiles: false, hasNativeChanges: result.hasNativeChanges, hmrData: null, platform: platformData.platformNameLowerCase });
 		}
+
+		return result;
 	}
 
 	private async startJSWatcherWithPrepare(platformData: IPlatformData, projectData: IProjectData, prepareData: IPrepareData): Promise<void> {
-		if (!this.watchersData[projectData.projectDir][platformData.platformNameLowerCase].webpackCompilerProcess) {
+		if (!this.watchersData[projectData.projectDir][platformData.platformNameLowerCase].hasWebpackCompilerProcess) {
 			this.$webpackCompilerService.on(WEBPACK_COMPILATION_COMPLETE, data => {
 				if (data.platform.toLowerCase() === platformData.platformNameLowerCase) {
 					this.emitPrepareEvent({ ...data, hasNativeChanges: false });
 				}
 			});
 
-			const childProcess = await this.$webpackCompilerService.compileWithWatch(platformData, projectData, prepareData);
-			this.watchersData[projectData.projectDir][platformData.platformNameLowerCase].webpackCompilerProcess = childProcess;
+			this.watchersData[projectData.projectDir][platformData.platformNameLowerCase].hasWebpackCompilerProcess = true;
+			await this.$webpackCompilerService.compileWithWatch(platformData, projectData, prepareData);
 		}
 	}
 
diff --git a/lib/controllers/preview-app-controller.ts b/lib/controllers/preview-app-controller.ts
index c1883a76bf..cdd90f39de 100644
--- a/lib/controllers/preview-app-controller.ts
+++ b/lib/controllers/preview-app-controller.ts
@@ -79,8 +79,10 @@ export class PreviewAppController extends EventEmitter implements IPreviewAppCon
 					this.platformPrepareHandlers[device.platform] = true;
 
 					// TODO: Remove the handler once the preview operation for this platform is stopped
-					this.$prepareController.on(PREPARE_READY_EVENT_NAME, async currentPrepareData => {
-						await this.handlePrepareReadyEvent(data, currentPrepareData.hmrData, currentPrepareData.files, device.platform);
+					this.$prepareController.on(PREPARE_READY_EVENT_NAME, async (currentPrepareData: IFilesChangeEventData) => {
+						if (currentPrepareData.platform.toLowerCase() === device.platform.toLowerCase()) {
+							await this.handlePrepareReadyEvent(data, currentPrepareData.hmrData, currentPrepareData.files, device.platform);
+						}
 					});
 
 				}
diff --git a/lib/services/ios-log-filter.ts b/lib/services/ios-log-filter.ts
index 4201ea6165..dfc0a7578c 100644
--- a/lib/services/ios-log-filter.ts
+++ b/lib/services/ios-log-filter.ts
@@ -13,13 +13,11 @@ export class IOSLogFilter implements Mobile.IPlatformLogFilter {
 
 	private partialLine: string = null;
 
-	constructor(private $logger: ILogger,
-		private $loggingLevels: Mobile.ILoggingLevels) {
+	constructor(private $loggingLevels: Mobile.ILoggingLevels) {
 	}
 
 	public filterData(data: string, loggingOptions: Mobile.IDeviceLogOptions = <any>{}): string {
 		const specifiedLogLevel = (loggingOptions.logLevel || '').toUpperCase();
-		this.$logger.trace("Logging options", loggingOptions);
 
 		if (specifiedLogLevel !== this.$loggingLevels.info || !data) {
 			return data;