Text tracks displayed twice for manifest with two periods

Created by: jeffcunat

Environment

• [] The MPD passes the DASH-IF Conformance Tool on https://conformance.dashif.org/
• [] The stream has correct Access-Control-Allow-Origin headers (CORS)
• [] There are no network errors such as 404s in the browser console when trying to play the stream
• [] The issue observed is not mentioned on https://github.com/Dash-Industry-Forum/dash.js/wiki/FAQ
• [] The issue occurs in the latest reference client on http://reference.dashif.org/dash.js/ and not just on my page

• Link to playable MPD file: https://media.axprod.net/TestVectors/v7-Clear/Manifest_MultiPeriod_1080p.mpd
• Dash.js version: 3.1.2
• Browser name/version: all
• OS name/version: all

Steps to reproduce

activate text tracks (any language)

Note that the manifest has two periods

Observed behaviour

Text tracks are displayed twice

Console output

Paste the contents of the browser console here.
You may need to enable debug logging in dash.js by calling player.updateSettings({ 'debug': { 'logLevel': dashjs.Debug.LOG_LEVEL_DEBUG }}) if you are using your own page.