Sum Progress (Σ Progress) is not showing correctly in the card layout

Summary

Sum Progress (Σ Progress) is not showing correctly in the card layout of Kanban and Sprint boards.

Steps to Reproduce

1. Create an issue and add value for Original Estimate
2. Log some work on the issue
3. Add "Σ Progress" field in Card Layout
4. View Kanban or Sprint board

Expected Results

"Σ Progress" should appear like this on the card:

Actual Results

"Σ Progress" appears like this on the card:

Workaround

There is no workaround.