Milestone percentage missing

In milestones list a percent complete value is visible. In milestone detail this value is missing.

Milestones list:

Version 1.0
32 Issues   0 Merge Requests   31% complete
[====================                              ]

Milestone detail -- current:

Version 1.0
Some description
----------------------------------------------------
Progress: 10 closed – 22 open
[====================                              ]

Milestone detail -- expected:

Version 1.0
Some description
----------------------------------------------------
Progress: 10 closed – 22 open (31 % of 32 complete)
[====================                              ]

It is just tiny detail, but it is very annoying ;)