Burndown Chart does not keep initial remaining time correctly

Summary

Burndown Chart does not keep initial remaining time correctly when work log happens soon after sprint starts

Steps to Reproduce

1. Create an issue with estimation of 3 days
2. Add it to sprint and start sprint
3. In the same minute, log work of 1 day (remaining time now is 2 days)
   

Expected Result

The burndown chart should still show the initial remaining time as 3 days, and have another entry of work log of 1 day, with remaining time of 2 days now

Actual Result

The burndown chart only shows 1 entry and that's 2 days as initial remaining time.