--- a/dom/media/webvtt/vtt.jsm
+++ b/dom/media/webvtt/vtt.jsm
@@ -1395,18 +1395,19 @@ const { XPCOMUtils } = require("resource
             }
             if (self.cue.text) {
               self.cue.text += "\n";
             }
             self.cue.text += line;
             break;
           case "BADCUE": // BADCUE
             // 54-62 - Collect and discard the remaining cue.
-            if (!line) {
-              self.state = "ID";
+            self.state = "ID";
+            if (line) { // keep this line to ID state.
+              continue;
             }
             break;
           }
           // The line was already parsed, empty it to ensure we can get the
           // new line in next iteration.
           line = null;
         }
       } catch (e) {