Inconsistent Behavior when Creating Issues via Backlog "+ Create issue" button.

Issue Summary

On the backlog page, when creating issues via the "+ Create issue" button at the bottom of a planned sprint or on the backlog section, it's not possible to change the Epic on the "Parent" field.

Steps to Reproduce

The problems seem to only happen when specific conditions are met:

1. You must be on the backlog a board (Scrum/Kanban)
2. The issue creation modal should trigger when clicking the "+ Create issue" button to quickly create issues:
   • The modal will trigger when there are fields other than Summary that are required to create issues, or
   • When the board's filter refers to a field that no longer exists (known bug)
3. When you click on "+ Create issue", the modal will appear where Summary and all other required fields must be provided. On the modal, the "Parent" field will be already filled with the last Epic that has been selected on the Epic filter of the board. This is the expected behavior when the create issue modal doesn't appear, as it should create the new issue inside the last selected Epic
4. For cases when the Create Issue modal does appear, and you try to change, on the "Parent" field, the Epic to any other, changes won't be kept. The last Selected Epic will be used always.

Expected Results

On the Issue creation modal, If the Epic is changed on the "Parent" field, the new issue should be created under the newly selected Epic.

Actual Results

On the Issue creation modal, If the Epic is manually changed on the "Parent" field, the issue is still created on the Epic that was on the Field before the manual change. This is the last Epic that has been selected on the Epic filter of the board.

Workaround

The workaround is to manually update the "Parent" field after the issue is created.