bug(YouTube): Incorrect queue counter in "Queue manager"

[98xe]

Bug description

Below is a screenshot of a queue with 5 videos in it, where the 4th one is currently playing.

It displays 7/5 when it should be 4/5.

--

If a queue has, for example, 5 videos in it,

It behaves like this

1/5
3/5
5/5
7/5
9/5

When it should be

1/5
2/5
3/5
4/5
5/5

The counter seems to increment by 2 instead of 1.

App version patched

20.51.39

Error logs

Acknowledgements

• I have checked all open and closed bug reports and this is not a duplicate.
• All requested information has been provided properly.

[MarcaDian]

This is the native interface of YouTube, I'm more than sure that this is a YouTube bug.

[MarcaDian]

@inotia00 Hey, I was looking into code and noticed that createPlaylistBody sets

morphe-patches/extensions/youtube/src/main/java/app/morphe/extension/youtube/patches/utils/requests/PlaylistRoutes.java

Line 89 in 978f8fb

body.put("params", "CAQ%3D");

when creating the queue playlist.
CAQ= decodes to protobuf 08 04, which might be setting the playlist type to some kind of "queue mode" - and my theory is that YouTube internally reserves two slots per video in that mode, which would explain why the counter increments by 2 (1, 3, 5, 7, 9 instead of 1, 2, 3, 4, 5).

Do you know what this params value does exactly, and could it be the cause of the issue?

[inotia00]

All endpoint requests in the Queue Manager mimic the endpoint requests on the YouTube web (on the YouTube web, Add to queue is available even when signed out).

CAQ%3D was used for the Add to queue endpoint request on the YouTube web.

As this bug does not appear to be reproduced in YouTube 20.21.37, there may have been changes to the internal code in the latest version.