diff --git a/src/manifests/handlers/dash/segment.ts b/src/manifests/handlers/dash/segment.ts
index 87c2ec8..b68cecb 100644
--- a/src/manifests/handlers/dash/segment.ts
+++ b/src/manifests/handlers/dash/segment.ts
@@ -37,10 +37,13 @@ export default async function dashSegmentHandler(
     const urlSearchParams = new URLSearchParams(event.queryStringParameters);
     const pathStem = path.basename(event.path).replace('.mp4', '');
     // Get the number part after "segment_"
-    const [, reqSegmentIndexOrTimeStr, representationIdStr, bitrateStr] =
+    // eslint-disable-next-line prefer-const
+    const [, reqSegmentIndexOrTimeStr, bitrateStr, ...representationIdStrList] =
       pathStem.split('_');
+    let representationIdStr = representationIdStrList.join('-');
     // Build correct Source Segment url
     // segment templates may contain a width parameter "$Number%0[width]d$", and then we need to zero-pad them to that length
+
     let segmentUrl = url;
 
     if (segmentUrl.includes('$Time$')) {
@@ -54,6 +57,12 @@ export default async function dashSegmentHandler(
     }
     const reqSegmentIndexInt = parseInt(reqSegmentIndexOrTimeStr);
 
+    const possibleId = pathStem.match(
+      /(audio|video)_track_\d+_\d+_[a-zA-Z]{3}=\d+_\d+/
+    );
+    if (possibleId) {
+      representationIdStr = possibleId[0];
+    }
     // Replace RepresentationID in url if present
     if (representationIdStr) {
       segmentUrl = segmentUrl.replace(
diff --git a/src/manifests/utils/dashManifestUtils.ts b/src/manifests/utils/dashManifestUtils.ts
index ae7e56f..8dee572 100644
--- a/src/manifests/utils/dashManifestUtils.ts
+++ b/src/manifests/utils/dashManifestUtils.ts
@@ -103,8 +103,8 @@ export default function (): DASHManifestTools {
               mediaUrl.match(/^http/) ? mediaUrl : baseUrl + mediaUrl,
               urlQuery,
               hasTime
-                ? 'proxy-segment/segment_$Time$_$RepresentationID$_$Bandwidth$'
-                : 'proxy-segment/segment_$Number$_$RepresentationID$_$Bandwidth$'
+                ? 'proxy-segment/segment_$Time$_$Bandwidth$_$RepresentationID$'
+                : 'proxy-segment/segment_$Number$_$Bandwidth$_$RepresentationID$'
             );
             segmentTemplate.$.media = proxy;
             // Initialization attr.
diff --git a/src/shared/utils.ts b/src/shared/utils.ts
index 9e99c8d..923d8ef 100644
--- a/src/shared/utils.ts
+++ b/src/shared/utils.ts
@@ -188,8 +188,10 @@ type ProxyBasenames =
   | '../../segments/proxy-segment'
   | 'proxy-segment/segment_$Number$.mp4'
   | 'proxy-segment/segment_$Time$.mp4'
-  | 'proxy-segment/segment_$Number$_$RepresentationID$_$Bandwidth$'
-  | 'proxy-segment/segment_$Time$_$RepresentationID$_$Bandwidth$';
+  | 'proxy-segment/segment_$Number$_$RepresentationID$'
+  | 'proxy-segment/segment_$Time$_$RepresentationID$'
+  | 'proxy-segment/segment_$Number$_$Bandwidth$_$RepresentationID$'
+  | 'proxy-segment/segment_$Time$_$Bandwidth$_$RepresentationID$';
 
 /**
  * Adjust paths based on directory navigation
@@ -225,7 +227,6 @@ export function proxyPathBuilder(
   if (!urlSearchParams) {
     return '';
   }
-  itemUri.replace('-', '/');
   const allQueries = new URLSearchParams(urlSearchParams);
   let sourceItemURL = '';
   // Do not build an absolute source url If ItemUri is already an absolut url.
diff --git a/src/testvectors/dash/dash1_compressed/proxy-manifest.xml b/src/testvectors/dash/dash1_compressed/proxy-manifest.xml
index 54cb16a..632f172 100644
--- a/src/testvectors/dash/dash1_compressed/proxy-manifest.xml
+++ b/src/testvectors/dash/dash1_compressed/proxy-manifest.xml
@@ -34,7 +34,7 @@
       <SegmentTemplate
         timescale="48000"
         initialization="https://mock.mock.com/stream/relative_base/audiotrack/init/$RepresentationID$.m4s"
-        media="proxy-segment/segment_$Time$_$RepresentationID$_$Bandwidth$?url=https%3A%2F%2Fmock.mock.com%2Fstream%2Frelative_base%2Faudiotrack%2F%24RepresentationID%24%2F%24Time%24.m4s&amp;statusCode=%5B%7Bi%3A0%2Ccode%3A404%7D%2C%7Bi%3A2%2Ccode%3A401%7D%5D&amp;timeout=%5B%7Bi%3A3%7D%5D&amp;delay=%5B%7Bi%3A2%2Cms%3A2000%7D%5D">
+        media="proxy-segment/segment_$Time$_$Bandwidth$_$RepresentationID$?url=https%3A%2F%2Fmock.mock.com%2Fstream%2Frelative_base%2Faudiotrack%2F%24RepresentationID%24%2F%24Time%24.m4s&amp;statusCode=%5B%7Bi%3A0%2Ccode%3A404%7D%2C%7Bi%3A2%2Ccode%3A401%7D%5D&amp;timeout=%5B%7Bi%3A3%7D%5D&amp;delay=%5B%7Bi%3A2%2Cms%3A2000%7D%5D">
         <SegmentTimeline>
           <S t="80746389121167" d="184320" r="78" />
         </SegmentTimeline>
@@ -62,7 +62,7 @@
       <SegmentTemplate
         timescale="600"
         initialization="https://mock.mock.com/stream/relative_base/videotrack/init/$RepresentationID$.m4s"
-        media="proxy-segment/segment_$Time$_$RepresentationID$_$Bandwidth$?url=https%3A%2F%2Fmock.mock.com%2Fstream%2Frelative_base%2Fvideotrack%2F%24RepresentationID%24%2F%24Time%24.m4s&amp;statusCode=%5B%7Bi%3A0%2Ccode%3A404%7D%2C%7Bi%3A2%2Ccode%3A401%7D%5D&amp;timeout=%5B%7Bi%3A3%7D%5D&amp;delay=%5B%7Bi%3A2%2Cms%3A2000%7D%5D">
+        media="proxy-segment/segment_$Time$_$Bandwidth$_$RepresentationID$?url=https%3A%2F%2Fmock.mock.com%2Fstream%2Frelative_base%2Fvideotrack%2F%24RepresentationID%24%2F%24Time%24.m4s&amp;statusCode=%5B%7Bi%3A0%2Ccode%3A404%7D%2C%7Bi%3A2%2Ccode%3A401%7D%5D&amp;timeout=%5B%7Bi%3A3%7D%5D&amp;delay=%5B%7Bi%3A2%2Cms%3A2000%7D%5D">
         <SegmentTimeline>
           <S t="1009329864060" d="2304" r="78" />
         </SegmentTimeline>
diff --git a/src/testvectors/dash/dash_period_baseurl/proxy-manifest.xml b/src/testvectors/dash/dash_period_baseurl/proxy-manifest.xml
index 29c7c95..c8081de 100644
--- a/src/testvectors/dash/dash_period_baseurl/proxy-manifest.xml
+++ b/src/testvectors/dash/dash_period_baseurl/proxy-manifest.xml
@@ -1,7 +1,7 @@
 <MPD xmlns="urn:mpeg:DASH:schema:MPD:2011" minBufferTime="PT1.500S" type="static" mediaPresentationDuration="PT0H0M10.000S" maxSegmentDuration="PT0H0M1.000S" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011 DASH-MPD.xsd">
   <Period id="0" start="PT0H0M0.000S">
     <AdaptationSet mimeType="video/mp4" codecs="avc1.4D401E" frameRate="30000/1001" lang="und">
-       <SegmentTemplate timescale="1000" media="proxy-segment/segment_$Number$_$RepresentationID$_$Bandwidth$?url=http%3A%2F%2Fvm2.dashif.org%2Flivesim-dev%2Fperiods_60%2Fvideo_%24Number%24.mp4" initialization="http://vm2.dashif.org/livesim-dev/periods_60/video_init.mp4" startNumber="1" presentationTimeOffset="0">
+       <SegmentTemplate timescale="1000" media="proxy-segment/segment_$Number$_$Bandwidth$_$RepresentationID$?url=http%3A%2F%2Fvm2.dashif.org%2Flivesim-dev%2Fperiods_60%2Fvideo_%24Number%24.mp4" initialization="http://vm2.dashif.org/livesim-dev/periods_60/video_init.mp4" startNumber="1" presentationTimeOffset="0">
         <SegmentTimeline>
           <S t="0" d="10000"/>
           <S t="10000" d="10000"/>
@@ -17,7 +17,7 @@
       </SegmentTemplate>
     </AdaptationSet>
     <AdaptationSet mimeType="audio/mp4" lang="und">
-      <SegmentTemplate timescale="1000" media="proxy-segment/segment_$Number$_$RepresentationID$_$Bandwidth$?url=http%3A%2F%2Fvm2.dashif.org%2Flivesim-dev%2Fperiods_60%2Faudio_%24Number%24.mp4" initialization="http://vm2.dashif.org/livesim-dev/periods_60/audio_init.mp4" startNumber="1" presentationTimeOffset="0">
+      <SegmentTemplate timescale="1000" media="proxy-segment/segment_$Number$_$Bandwidth$_$RepresentationID$?url=http%3A%2F%2Fvm2.dashif.org%2Flivesim-dev%2Fperiods_60%2Faudio_%24Number%24.mp4" initialization="http://vm2.dashif.org/livesim-dev/periods_60/audio_init.mp4" startNumber="1" presentationTimeOffset="0">
         <SegmentTimeline>
           <S t="0" d="10000"/>
           <S t="10000" d="10000"/>