Index: src/wp-includes/js/tinymce/plugins/wptextpattern/plugin.js
===================================================================
--- src/wp-includes/js/tinymce/plugins/wptextpattern/plugin.js	(revision 38167)
+++ src/wp-includes/js/tinymce/plugins/wptextpattern/plugin.js	(working copy)
@@ -63,8 +63,12 @@
 				enter();
 			}
 
+			if ( VK.metaKeyPressed( event ) ) {
+				return;
+			}
+
 			// Wait for the browser to insert the character.
-			if ( event.keyCode === VK.SPACEBAR && ! event.ctrlKey && ! event.metaKey && ! event.altKey ) {
+			if ( event.keyCode === VK.SPACEBAR ) {
 				setTimeout( space );
 			} else if ( event.keyCode > 47 && ! ( event.keyCode >= 91 && event.keyCode <= 93 ) ) {
 				setTimeout( inline );