Watch progress not updated with intros

[Lodeli]

Describe the bug
With intros enabled, the progress of the watched show is not updated.
Continue watching won't show the progress for movies or series and Next Up won't update.

To Reproduce
Configure JellyCon and enable intros.
Play any media through the plugin, movie or series.

Expected behavior
When stopping the show, the Next Up or the Continue watching sections should be updated in Kodi and on the Jellyfin server side.

Screenshots
It seems that JellyCon uses a playlist to play both intro and media file but only info about the first file in the playlist are sent as currently playing.
Here you can see a screenshot from the Jellyfin Server Dashboard: while the movie was playing, the progress kept showing the intro even though it only lasts 11 seconds leading also to a wrong progress time:

System:

• OS: Fire OS
• Jellyfin Version: 10.10.3
• Kodi Version: 21.1.0
• Addon Version: 0.8.0+py3

[Lodeli]

I've just tried to have a look at the code.
It's my first time with python and with Kodi addons in general, so it's very likely I'm totally wrong.

I checked the method send_progress() and it seems to rely on the return value of get_playing_data(), so I tried to check the value of the variable playlist_data_string while playing a random intro and then a media file.

The value contains always one single item: it's always only the intro.
Here an example:
{ "{jellyfin-server}/Videos/3c922ee407bb4883b04d85caad6666ac/stream?static=True&PlaySessionId=cdb857dc175048e7af6adea3be0de4c4&MediaSourceId=3c922ee407bb4883b04d85caad6666ac": { "item_id": "3c922ee407bb4883b04d85caad6666ac", "source_id": "3c922ee407bb4883b04d85caad6666ac", "playback_type": "DirectStream", "play_session_id": "cdb857dc175048e7af6adea3be0de4c4", "play_action_type": "play_all" } }

[Lodeli]

I also checked the variable play_data_string and found a weird behavior.

Its duration property changes while keeping the same item_id.

Before - playing the intro:
{"item_id": "7292f79adc574411a8836da2792b4923", "source_id": "7292f79adc574411a8836da2792b4923", "playback_type": "DirectStream", "play_session_id": "f12d64bea86d4dae865fc98634d64c82", "play_action_type": "play_all", "current_position": -0.099, "duration": 10.048, "currently_playing": true}

After - playing the real media:
{"item_id": "7292f79adc574411a8836da2792b4923", "source_id": "7292f79adc574411a8836da2792b4923", "playback_type": "DirectStream", "play_session_id": "f12d64bea86d4dae865fc98634d64c82", "play_action_type": "play_all", "current_position": -0.099, "duration": 3818.64, "currently_playing": true}

Duration change from 10s to 1h but the item id remains the same.