diff --git a/package-lock.json b/package-lock.json
index 3df13ca62b..388ed25895 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "dashjs",
-  "version": "4.5.4",
+  "version": "4.5.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index ef6b79adba..59aae65236 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "dashjs",
-    "version": "4.5.4",
+    "version": "4.5.5",
     "description": "A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.",
     "author": "Dash Industry Forum",
     "license": "BSD-3-Clause",
diff --git a/src/dash/models/DashManifestModel.js b/src/dash/models/DashManifestModel.js
index 283eed5208..528cfc5f6c 100644
--- a/src/dash/models/DashManifestModel.js
+++ b/src/dash/models/DashManifestModel.js
@@ -594,11 +594,14 @@ function DashManifestModel() {
                             // initialization source url will be determined from
                             // BaseURL when resolved at load time.
                         }
-                    } else if (getIsText(processedRealAdaptation) &&
-                        getIsFragmented(processedRealAdaptation) &&
-                        processedRealAdaptation.mimeType &&
-                        processedRealAdaptation.mimeType.indexOf('application/mp4') === -1) {
-                        voRepresentation.range = 0;
+                    } else {
+                        const mimeType = processedRealAdaptation.mimeType || getMimeType(processedRealAdaptation);
+                        if (getIsText(processedRealAdaptation) &&
+                            getIsFragmented(processedRealAdaptation) &&
+                            mimeType &&
+                            mimeType.indexOf('application/mp4') === -1) {
+                            voRepresentation.range = 0;
+                        }
                     }
 
                     if (segmentInfo.hasOwnProperty(DashConstants.TIMESCALE)) {
diff --git a/src/streaming/SourceBufferSink.js b/src/streaming/SourceBufferSink.js
index 4d53569fcb..8ce5c4d795 100644
--- a/src/streaming/SourceBufferSink.js
+++ b/src/streaming/SourceBufferSink.js
@@ -136,7 +136,7 @@ function SourceBufferSink(config) {
 
         } catch (e) {
             // Note that in the following, the quotes are open to allow for extra text after stpp and wvtt
-            if ((mediaInfo.type == constants.TEXT && !mediaInfo.isFragmented) || (codec.indexOf('codecs="stpp') !== -1) || (codec.indexOf('codecs="vtt') !== -1)) {
+            if ((mediaInfo.type == constants.TEXT && !mediaInfo.isFragmented) || (codec.indexOf('codecs="stpp') !== -1) || (codec.indexOf('codecs="vtt') !== -1) || (codec.indexOf('text/vtt') !== -1)) {
                 return _initializeForText(streamInfo);
             }
             return Promise.reject(e);
diff --git a/src/streaming/text/TextTracks.js b/src/streaming/text/TextTracks.js
index d22c36fb0e..64a54f7056 100644
--- a/src/streaming/text/TextTracks.js
+++ b/src/streaming/text/TextTracks.js
@@ -569,8 +569,9 @@ function TextTracks(config) {
     function cueInTrack(track, cue) {
         if (!track.cues) return false;
         for (let i = 0; i < track.cues.length; i++) {
-            if ((track.cues[i].startTime === cue.startTime) &&
-                (track.cues[i].endTime === cue.endTime)) {
+            if (track.cues[i].startTime === cue.startTime &&
+                track.cues[i].endTime === cue.endTime &&
+                track.cues[i].text === cue.text) {
                 return true;
             }
         }