[BUG] Can't create issue with watchers via API call

[protoroto]

Describe the bug

I can't create an issue via API call including watchers. The issue is getting created, but no watchers are there.

How can we reproduce the behavior

Following the documentation here https://docs.taiga.io/api.html#issues-create , just add some user id inside watchers. Issue will be created, but no watchers are present

Screenshots

This is what I see if I make a POST via curl

curl -X POST \
> -H "Content-Type: application/json" \
> -H "Authorization: Bearer <my token>" \
> -d '{
>         "assigned_to": null,
>         "description": "Implement API CALL",
>         "is_blocked": false,
>         "is_closed": false,
>         "milestone": null,
>         "priority": 369,
>         "project": 130,
>         "severity": 489,
>         "status": 1031,
>         "subject": "Customer personal data",
>         "type": 499,
>         "watchers": [7,88]
>     }' \
> -s <my taiga url>/api/v1/issues
{"tags": [], "due_date": null, "due_date_reason": "", "due_date_status": "not_set", "attachments": [], "project": 130, "project_extra_info": {"name": "Board di test", "slug": "board-di-test", "logo_small_url": "<my taiga url>/media/project/b/f/b/7/c459cae3fe51aca6f1084f2c18e1b50935b06eea5e26274c5de20127f482/taiga-logo.jpg.80x80_q85_crop.jpg?token=ZOSw3Q%3ALgWCYGiGhEbeVupxK6gZJVXcu92QXEkYGYstLQFPXbnBNEp3WAsFVDkrGjFgcFoXy9kqe8z0qHMeujr1mfyS1Q", "id": 130}, "status": 1031, "status_extra_info": {"name": "Incoming", "color": "#ef2929", "is_closed": false}, "assigned_to": null, "assigned_to_extra_info": null, "owner": 22, "owner_extra_info": {"username": "taiga", "full_name_display": "taiga", "photo": "<my taiga url>/media/user/1/a/a/f/8fcef908677e6f7d752e7b2576b9de542e739d21f5ed9e630a3a8334a295/nephila_spider_logo.png.80x80_q85_crop.jpg?token=ZOSw3Q%3AGAzy6tbGDk0pT6m69tBA_qfneOCadJF958rgmUtZA5rwaFO9G30DKhP6gdRn6oANaY0zLyLvAIbeFEsH4d9xRQ", "big_photo": "<my taiga url>/media/user/1/a/a/f/8fcef908677e6f7d752e7b2576b9de542e739d21f5ed9e630a3a8334a295/nephila_spider_logo.png.300x300_q85_crop.jpg?token=ZOSw3Q%3AYNQvpjtWkJHn_TfZOY7h2g-hMRjNeB0TycCVckzFVnndfBDUfTPcm0rtQ9AZXOMZHwrvDQCve5PJxjiVf3oiQQ", "gravatar_id": "3f362bdd00dbd0cefbd9b3c4febfb3da", "is_active": true, "id": 22}, "is_watcher": false, "total_watchers": 0, "is_voter": false, "total_voters": 0, "id": 12059, "ref": 16, "severity": 489, "priority": 369, "type": 499, "milestone": null, "created_date": "2023-08-22T12:58:05.179Z", "modified_date": "2023-08-22T12:58:05.190Z", "finished_date": null, "subject": "Customer personal data", "external_reference": null, "version": 1, "watchers": [], "is_blocked": false, "blocked_note": "", "is_closed": false, "comment": "", "generated_user_stories": null, "blocked_note_html": "", "description": "Implement API CALL", "description_html": "<p>Implement API CALL</p>"}

Taiga environment

Taiga environment is self hosted.