diff --git a/packages/block-editor/src/store/actions.js b/packages/block-editor/src/store/actions.js
index 61acae16fcca2d..d6eaac9c7e8c9b 100644
--- a/packages/block-editor/src/store/actions.js
+++ b/packages/block-editor/src/store/actions.js
@@ -1612,42 +1612,31 @@ export const __unstableSetEditorMode =
 		// When switching to zoom-out mode, we need to select the parent section
 		if ( mode === 'zoom-out' ) {
 			const firstSelectedClientId = select.getBlockSelectionStart();
-			const allBlocks = select.getBlocks();
-
 			const { sectionRootClientId } = unlock(
 				registry.select( STORE_NAME ).getSettings()
 			);
-			if ( sectionRootClientId ) {
-				const sectionClientIds =
-					select.getBlockOrder( sectionRootClientId );
-				const lastSectionClientId =
-					sectionClientIds[ sectionClientIds.length - 1 ];
-				if ( sectionClientIds ) {
-					if ( firstSelectedClientId ) {
-						const parents = select.getBlockParents(
-							firstSelectedClientId
-						);
-						const firstSectionClientId = parents.find( ( parent ) =>
+			if ( firstSelectedClientId ) {
+				let sectionClientId;
+
+				if ( sectionRootClientId ) {
+					const sectionClientIds =
+						select.getBlockOrder( sectionRootClientId );
+					sectionClientId = select
+						.getBlockParents( firstSelectedClientId )
+						.find( ( parent ) =>
 							sectionClientIds.includes( parent )
 						);
-						if ( firstSectionClientId ) {
-							dispatch.selectBlock( firstSectionClientId );
-						} else {
-							dispatch.selectBlock( lastSectionClientId );
-						}
-					} else {
-						dispatch.selectBlock( lastSectionClientId );
-					}
+				} else {
+					sectionClientId = select.getBlockHierarchyRootClientId(
+						firstSelectedClientId
+					);
+				}
+
+				if ( sectionClientId ) {
+					dispatch.selectBlock( sectionClientId );
+				} else {
+					dispatch.clearSelectedBlock();
 				}
-			} else if ( firstSelectedClientId ) {
-				const rootClientId = select.getBlockHierarchyRootClientId(
-					firstSelectedClientId
-				);
-				dispatch.selectBlock( rootClientId );
-			} else {
-				// If there's no block selected and no sectionRootClientId, select the last root block.
-				const lastRootBlock = allBlocks[ allBlocks.length - 1 ];
-				dispatch.selectBlock( lastRootBlock?.clientId );
 			}
 		}