Fix crash when starting a download with chaqpters from a UnmeteredSource (cherry picked from commit 470a5764417ccd63a274ccea0e483a12ec1adbda) (cherry picked from commit 1e53ad97db7ed91d54d872de0330b1cd6cb8bd4c)
Fix crash when starting a download with chaqpters from a UnmeteredSource (cherry picked from commit 470a5764417ccd63a274ccea0e483a12ec1adbda) (cherry picked from commit 1e53ad97db7ed91d54d872de0330b1cd6cb8bd4c)