Time submitted in minutes from Crucible being logged as hours in JIRA issues

Steps to reproduce:

1. Integrate JIRA 6.3.9 with FishEye 3.5.3 (this was not tested with other versions)
2. Make sure the default time tracking unit in JIRA is set to 'hours'
3. Submit time log (e.g., 10m) from a linked Crucible review to the JIRA issue
4. Notice that the time submitted, regardless of the unit, will be in hours
   In the JIRA issue, it will show the '10m' logged as '1d 2h' (1 day of 8 hours + 2 hours = 10 hours)

Screenshot from Crucible side showing that '10m' have been logged:

Screenshot from JIRA side showing that '1d 2h' have been logged:

Workaround:
Use the default units in JIRA side as minutes and make sure to specify all values that way.

Note:
There's a similar closed bug report (CRUC-6890) but that's supposed to happen only "when closing review".