diff --git a/goofy-client/apps/goofy-e2e/src/integration/main-tests/wiedervorlage-attachment/wiedervorlage-attachment.e2e-spec.ts b/goofy-client/apps/goofy-e2e/src/integration/main-tests/wiedervorlage-attachment/wiedervorlage-attachment.e2e-spec.ts
index 40b75498cb7bc6bf7324993a2b52a123f5dbcffa..ba33064224e38a6e59e2c85881154acd8d54170f 100644
--- a/goofy-client/apps/goofy-e2e/src/integration/main-tests/wiedervorlage-attachment/wiedervorlage-attachment.e2e-spec.ts
+++ b/goofy-client/apps/goofy-e2e/src/integration/main-tests/wiedervorlage-attachment/wiedervorlage-attachment.e2e-spec.ts
@@ -1,4 +1,5 @@
 import { AttachmentContainerE2EComponent, AttachmentListE2EComponent } from 'apps/goofy-e2e/src/components/attachment/attachment.e2e.component';
+import { WiedervorlageSubnavigationE2EComponent } from 'apps/goofy-e2e/src/components/wiedervorlage/wiedervorlage-subnavigation';
 import { BinaryFileSnackbarMessageE2E } from 'apps/goofy-e2e/src/model/binary-file';
 import { WiedervorlageE2E } from 'apps/goofy-e2e/src/model/wiedervorlage';
 import { dropCollections, readFileFromDownloads } from 'apps/goofy-e2e/src/support/cypress-helper';
@@ -11,7 +12,7 @@ import { VorgangE2E } from '../../../model/vorgang';
 import { MainPage, waitForSpinnerToDisappear } from '../../../page-objects/main.po';
 import { VorgangPage } from '../../../page-objects/vorgang.po';
 import { WiedervorlagePage } from '../../../page-objects/wiedervorlage.po';
-import { contains, exist, notExist } from '../../../support/cypress.util';
+import { containClass, contains, exist, haveLength, notContainClass, notExist } from '../../../support/cypress.util';
 import { TEST_FILE_WITHOUT_CONTENT, TEST_FILE_WITH_CONTENT, TEST_FILE_WITH_CONTENT_46MB } from '../../../support/data.util';
 import { uploadEmptyFile, uploadFile } from '../../../support/file-upload';
 import { loginAsSabine } from '../../../support/user-util';
@@ -29,6 +30,7 @@ describe('Wiedervorlage attachments', () => {
 	const wiedervorlageContainer: WiedervorlageE2EComponent = wiedervorlagePage.getWiedervorlageContainer();
 	const attachmentContainer: AttachmentContainerE2EComponent = wiedervorlageContainer.getAttachmentContainer();
 	const attachmentList: AttachmentListE2EComponent = attachmentContainer.getList();
+	const subnavigation: WiedervorlageSubnavigationE2EComponent = wiedervorlagePage.getSubnavigation();
 
 	const snackbar: SnackBarE2EComponent = mainPage.getSnackBar();
 
@@ -141,7 +143,7 @@ describe('Wiedervorlage attachments', () => {
 
 		const wiedervorlageComp: WiedervorlageInVorgangE2EComponent = wiedervorlageContainerInVorgang.getWiedervorlage(WIEDERVORLAGE_WITH_ATTACHMENTS_BETREFF);
 
-		it('open wiedervorlage page', () => {
+		it('should open wiedervorlage page', () => {
 			wiedervorlageComp.getLink().click();
 
 			exist(attachmentList.getItem(TEST_FILE_WITHOUT_CONTENT).getRoot());
@@ -188,4 +190,33 @@ describe('Wiedervorlage attachments', () => {
 			wiedervorlagePage.getSubnavigation().navigateBack();
 		})
 	})
+
+	describe('Same number of attachments after status change', () => {
+		const wiedervorlageComp: WiedervorlageInVorgangE2EComponent = wiedervorlageContainerInVorgang.getWiedervorlage(WIEDERVORLAGE_WITH_ATTACHMENTS_BETREFF);
+
+		it('should open wiedervorlage page', () => {
+			wiedervorlageComp.getLink().click();
+
+			exist(attachmentList.getItem(TEST_FILE_WITH_CONTENT).getRoot());
+		})
+
+		it('should mark as erledigt', () => {
+			subnavigation.erledigen();
+
+			containClass(wiedervorlageContainer.getStatusDot(), 'erledigt');
+		})
+
+		it('should mark as open', () => {
+			subnavigation.wiedereroeffnen();
+
+			notContainClass(wiedervorlageContainer.getStatusDot(), 'erledigt');
+		})
+
+		it('should still have 1 attachment only', () => {
+			const attachmentList: AttachmentListE2EComponent = wiedervorlageContainerInVorgang.getWiedervorlage(wiedervorlage.betreff).getAttachmentContainer().getList();
+
+			haveLength(attachmentList.getRoot(), 1);
+		})
+	})
+
 })
\ No newline at end of file
diff --git a/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.html b/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.html
index 0e705c9498f60c7f8437733ee14452e9ca01ce55..9fc8545c7c6fbfd08307be7b66c06d4f174aa595 100644
--- a/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.html
+++ b/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.html
@@ -1,4 +1,4 @@
-<div class="binary-file-list">
+<div class="binary-file-list" data-test-id="file-list">
 	<goofy-client-binary-file-container *ngFor="let file of fileList"
 		[file]="file" [deletable]="true"
 		(startDelete)="deleteAttachment($event)">
diff --git a/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.spec.ts b/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.spec.ts
index bf85371b793952bfd65dceaf570513051e4d0e4f..2118870ab17bef4bdc4ecdbd83ccf76aef9be950 100644
--- a/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.spec.ts
+++ b/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.spec.ts
@@ -46,6 +46,19 @@ describe('BinaryFileAttachmentContainerComponent', () => {
 		expect(component).toBeTruthy();
 	})
 
+	describe('existing files', () => {
+		it('should show existing files', () => {
+			const binaryFile2: BinaryFileResource = createBinaryFileResource();
+
+			component.existFiles = [binaryFile2, binaryFile];
+			fixture.detectChanges();
+
+			expect(component.fileList.length).toBe(2);
+			expect(component.fileList[0]).toBe(binaryFile2);
+			expect(component.fileList[1]).toBe(binaryFile);
+		})
+	})
+
 	describe('upload file', () => {
 		const file: File = <any>{ name: 'TestDatei' };
 		const responseStateResource: StateResource<BinaryFileResource> = createStateResource(binaryFile);
diff --git a/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.ts b/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.ts
index c578ce8b096737ed7bc6d51e9afc49bc3ed47345..2b2c2a35fe0d0cb35c6a5f03af83f4cea7047016 100644
--- a/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.ts
+++ b/goofy-client/libs/binary-file/src/lib/binary-file-attachment-container/binary-file-attachment-container.component.ts
@@ -1,4 +1,4 @@
-import { Component, Input, OnChanges, SimpleChanges } from '@angular/core';
+import { Component, Input } from '@angular/core';
 import { BinaryFileResource, BinaryFileService } from '@goofy-client/binary-file-shared';
 import { createEmptyStateResource, doOnValidStateResource, isNotNil, StateResource } from '@goofy-client/tech-shared';
 import { getUrl, Resource, ResourceUri } from '@ngxp/rest';
@@ -10,24 +10,20 @@ import { tap } from 'rxjs/operators';
 	templateUrl: './binary-file-attachment-container.component.html',
 	styleUrls: ['./binary-file-attachment-container.component.scss'],
 })
-export class BinaryFileAttachmentContainerComponent implements OnChanges {
+export class BinaryFileAttachmentContainerComponent {
 
-	@Input() existFiles: BinaryFileResource[];
 	@Input() formArrayName: string;
 	@Input() uploadStateResource: StateResource<Resource>;
 	@Input() linkRelUploadAttachment: string;
+	@Input() set existFiles(value: BinaryFileResource[]) {
+		this.fileList = isNotNil(value) ? value : [];
+	}
 
 	uploadInProgress$: Observable<StateResource<any>> = of(createEmptyStateResource());
 	fileList: BinaryFileResource[] = [];
 
 	constructor(private binaryFileService: BinaryFileService) { }
 
-	ngOnChanges(changes: SimpleChanges): void {
-		if (changes.existFiles) {
-			if (isNotNil(this.existFiles)) this.fileList = this.fileList.concat(this.existFiles);
-		}
-	}
-
 	getFileUriList(): string[] {
 		return this.fileList.map(file => getUrl(file));
 	}