Not working Patch Manifest with S[@t=<Timevalue>]

[Iragne]

Have you read the FAQ and checked for duplicate open issues?
Yes

If the problem is related to FairPlay, have you read the tutorial?

N/A

What version of Shaka Player are you using?

Latest

Can you reproduce the issue with our latest release version?
Yes

Can you reproduce the issue with the latest code from main?
Yes

Are you using the demo app or your own custom app?
Yes

If custom app, can you reproduce the issue using our demo app?
N/A

What browser and OS are you using?
FF and Chrome

For embedded devices (smart TVs, etc.), what model and firmware version are you using?
N/A

What are the manifest and license server URIs?

What configuration are you using? What is the output of player.getConfiguration()?

Default

What did you do?

Just play a manifest with patch manifest inside and the patch manifest is using [@t=] instead of S[]
/MPD/Period[@id='1']/AdaptationSet[@id='1']/Representation[@id='3']/SegmentTemplate/SegmentTimeline/S[@t='1']/@r

according to the Dash spec you can use @t= and @n= to reference the position
What did you expect to happen?
S[@t=] to work
Doc ISO_IEC 23009-1_2022 ed.5 - id.83314 Publication PDF (en).pdf page 158
S elements shall be addressed in one of the following ways:
— @t or @n attribute
— by position.

What actually happened?

the patch update is not updating the manifest stream timeline as expected
That is the reason why the stream here was not working
#7025

Are you planning send a PR to fix it?
Yes