Summary

Incomplete issues that are from other boards which share the same sprint are not being moved to the  next target sprint.

However, the incomplete issue count is showing correctly during sprint completion dialogue.

Steps to reproduce

1. Create 2 projects(A & B) with Scrum board for each. The JQLs used are specific to the projects itself e.g. project = PROJA.
2. Create 2 issues in project A and start a sprint(Sprint 1) with the 2 issues.
3. Create 2 issues in project B and specifically assign the issues to the sprint created for project A - manually include "Sprint 1" in Sprint field.
4. In project B board, Sprint 1 should appear with the 2 issues from project B.
5. Go to project A board and create a new sprint from backlog view(Future Sprint).
6. Then, proceed with completing Sprint 1 from project A board.
7. Note that number for Incomplete Issues would be 4 (2 from A and 2 from B).
8. Select Future Sprint from the dropdown and complete Sprint 1.
9. Note that the 2 issues from project A will be under Future Sprint but checking project B board, the 2 issues it has will be under Backlog.

Expected result

With the number of incomplete issue is correctly shown, Future Sprint should have 4 issues from both projects instead of just the issues from the project where the sprint has been completed.

Current result

All other boards' issues are moved to backlog.