Bug report 🐛: only reviewer using the quick action is assigned when assigning multiple reviewers using both quick action and UI dropdown

Bug: Reviewer assignment conflict between quick action and UI dropdown

Description

When creating a merge request (MR), if a user assigns a reviewer using both methods simultaneously:

1. Quick action string (/assign_reviewer) in the Description box
2. UI dropdown menu for reviewer assignment

The resulting MR page only displays the reviewer assigned through the quick action, while the reviewer selected via the UI dropdown is ignored.

Screen shot

Expected Behavior

Both reviewer assignment methods should work together without conflict, or the system should properly merge/combine reviewers from both sources.

Actual Behavior

Only the reviewer assigned via the /assign_reviewer quick action appears on the final MR page, while the UI dropdown selection is discarded.

Impact

This creates confusion for users who expect both assignment methods to work independently or in combination, potentially leading to missing reviewer assignments.

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Description was generated using AI