diff --git a/packages/ckeditor5-html-support/src/datafilter.ts b/packages/ckeditor5-html-support/src/datafilter.ts
index 13cb3ed3973..11a6c943d5f 100644
--- a/packages/ckeditor5-html-support/src/datafilter.ts
+++ b/packages/ckeditor5-html-support/src/datafilter.ts
@@ -461,7 +461,7 @@ export default class DataFilter extends Plugin {
 				}
 
 				// Remove the coupled GHS attributes on the same range as the feature attribute was removed.
-				for ( const { item } of change.range.getWalker( { shallow: true } ) ) {
+				for ( const { item } of change.range.getWalker() ) {
 					for ( const attributeKey of attributeKeys ) {
 						if ( item.hasAttribute( attributeKey ) ) {
 							writer.removeAttribute( attributeKey, item );
diff --git a/packages/ckeditor5-html-support/tests/integrations/list.js b/packages/ckeditor5-html-support/tests/integrations/list.js
index 84e260da737..75de9f6e450 100644
--- a/packages/ckeditor5-html-support/tests/integrations/list.js
+++ b/packages/ckeditor5-html-support/tests/integrations/list.js
@@ -8,6 +8,7 @@ import GeneralHtmlSupport from '../../src/generalhtmlsupport.js';
 import ClassicTestEditor from '@ckeditor/ckeditor5-core/tests/_utils/classictesteditor.js';
 import Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph.js';
 import ListEditing from '@ckeditor/ckeditor5-list/src/list/listediting.js';
+import TableEditing from '@ckeditor/ckeditor5-table/src/tableediting.js';
 
 import testUtils from '@ckeditor/ckeditor5-core/tests/_utils/utils.js';
 import stubUid from '@ckeditor/ckeditor5-list/tests/list/_utils/uid.js';
@@ -28,7 +29,7 @@ describe( 'ListElementSupport', () => {
 
 		editor = await ClassicTestEditor
 			.create( editorElement, {
-				plugins: [ Paragraph, GeneralHtmlSupport, ListEditing ]
+				plugins: [ Paragraph, GeneralHtmlSupport, ListEditing, TableEditing ]
 			} );
 		model = editor.model;
 		dataFilter = editor.plugins.get( 'DataFilter' );
@@ -1013,6 +1014,145 @@ describe( 'ListElementSupport', () => {
 		} );
 	} );
 
+	describe( '#15527 and #15565', () => {
+		// See https://github.com/ckeditor/ckeditor5/issues/15527.
+		it( 'should not remove attribute from other elements (inside GHS div)', () => {
+			const dataFilter = editor.plugins.get( 'DataFilter' );
+
+			// Allow everything
+			dataFilter.allowElement( /^.*$/ );
+			dataFilter.allowAttributes( { name: /^.*$/, attributes: true } );
+			dataFilter.allowAttributes( { name: /^.*$/, classes: true } );
+
+			editor.setData(
+				'<div>' +
+					'<ol>' +
+						'<li>foo</li>' +
+						'<li>' +
+							'<div>' +
+								'<ol>' +
+									'<li>bar</li>' +
+								'</ol>' +
+							'</div>' +
+						'</li>' +
+					'</ol>' +
+				'</div>'
+			);
+
+			model.change( writer => {
+				writer.setSelection( model.document.getRoot().getNodeByPath( [ 0, 1, 0 ] ), 0 );
+			} );
+
+			expect( getModelDataWithAttributes( model ) ).to.deep.equal( {
+				data:
+					'<htmlDiv>' +
+						'<paragraph htmlLiAttributes="(1)" htmlOlAttributes="(2)" listIndent="0" listItemId="a00" listType="numbered">' +
+							'foo' +
+						'</paragraph>' +
+						'<htmlDiv htmlLiAttributes="(3)" htmlOlAttributes="(4)" listIndent="0" listItemId="a02" listType="numbered">' +
+							'<paragraph' +
+								' htmlLiAttributes="(5)" htmlOlAttributes="(6)" listIndent="0" listItemId="a01" listType="numbered">' +
+								'[]bar' +
+							'</paragraph>' +
+						'</htmlDiv>' +
+					'</htmlDiv>',
+				attributes: {
+					1: {},
+					2: {},
+					3: {},
+					4: {},
+					5: {},
+					6: {}
+				}
+			} );
+
+			editor.editing.view.document.fire( 'delete', { direction: 'backward', preventDefault() {} } );
+
+			expect( getModelDataWithAttributes( model, { withoutSelection: true } ) ).to.deep.equal( {
+				data:
+					'<htmlDiv>' +
+						'<paragraph htmlLiAttributes="(1)" htmlOlAttributes="(2)" listIndent="0" listItemId="a00" listType="numbered">' +
+							'foo' +
+						'</paragraph>' +
+						'<htmlDiv htmlLiAttributes="(3)" htmlOlAttributes="(4)" listIndent="0" listItemId="a02" listType="numbered">' +
+							'<paragraph>bar</paragraph>' +
+						'</htmlDiv>' +
+					'</htmlDiv>',
+				attributes: {
+					1: {},
+					2: {},
+					3: {},
+					4: {}
+				}
+			} );
+		} );
+
+		// See https://github.com/ckeditor/ckeditor5/issues/15565.
+		it( 'should not remove attribute from other elements (inside table cell)', () => {
+			const dataFilter = editor.plugins.get( 'DataFilter' );
+
+			// Allow everything
+			dataFilter.allowElement( /^.*$/ );
+			dataFilter.allowAttributes( { name: /^.*$/, attributes: true } );
+			dataFilter.allowAttributes( { name: /^.*$/, classes: true } );
+
+			editor.setData(
+				'<ul>' +
+					'<li>' +
+						'<p><br>&nbsp;</p>' +
+						'<figure class="table">' +
+							'<table>' +
+								'<tbody>' +
+									'<tr>' +
+										'<td>' +
+											'<ul><li>&nbsp;</li></ul>' +
+										'</td>' +
+									'</tr>' +
+								'</tbody>' +
+							'</table>' +
+						'</figure>' +
+					'</li>' +
+				'</ul>'
+			);
+
+			model.change( writer => {
+				writer.setSelection( model.document.getRoot().getNodeByPath( [ 1, 0, 0, 0 ] ), 0 );
+			} );
+
+			expect( getModelData( model ) ).to.equal(
+				'<paragraph htmlLiAttributes="{}" htmlUlAttributes="{}" listIndent="0" listItemId="a01" listType="bulleted">' +
+					'<htmlCustomElement htmlContent="" htmlElementName="br"></htmlCustomElement> ' +
+				'</paragraph>' +
+				'<table htmlLiAttributes="{}" htmlUlAttributes="{}" listIndent="0" listItemId="a01" listType="bulleted">' +
+					'<tableRow>' +
+						'<tableCell>' +
+							'<paragraph htmlLiAttributes="{}" htmlUlAttributes="{}" listIndent="0" listItemId="a00" listType="bulleted">' +
+								'[]' +
+							'</paragraph>' +
+						'</tableCell>' +
+					'</tableRow>' +
+				'</table>'
+			);
+
+			editor.editing.view.document.fire( 'enter', { preventDefault() {} } );
+
+			expect( getModelData( model ) ).to.equal(
+				'<paragraph htmlLiAttributes="{}" htmlUlAttributes="{}" listIndent="0" listItemId="a01" listType="bulleted">' +
+					'<htmlCustomElement htmlContent="" htmlElementName="br"></htmlCustomElement> ' +
+				'</paragraph>' +
+				'<table htmlLiAttributes="{}" htmlUlAttributes="{}" listIndent="0" listItemId="a01" listType="bulleted">' +
+					'<tableRow>' +
+						'<tableCell>' +
+							'<paragraph>' +
+								'[]' +
+							'</paragraph>' +
+						'</tableCell>' +
+					'</tableRow>' +
+				'</table>'
+			);
+		} );
+	} );
+
 	function paragraph( text, id, indent, type, listAttributes ) {
 		const attributeName = type === 'bulleted' ?
 			'htmlUlAttributes' :