Bug: Duplicated Labels in Issue Tracker

[BonomoJoaoPaulo]

Description

When adding and removing a newly created label in an issue, the system allows the label to be added multiple times, even when it is unchecked.

Steps to Reproduce

1. Create a new issue in Tracker;
2. Create a new label and add it to the issue;
3. Click to remove the label;
4. Click again to add and remove the label multiple times;
5. Observe that the label keeps getting added multiple times instead of being removed.

Expected Behavior

The label should be removed from the issue when unchecked and should not be duplicated.

Observed Behavior

The label is duplicated indefinitely when added and removed multiple times, even if it is unchecked.

Evidence

📹 Video demonstration:

huly_labels_bug_video.mp4

🖼️ Screenshot of issue with duplicated labels:

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OBS: This is my first issue report in GitHub, if something is missing, please tell me. 🙂