Redmine

All,

When moving an issue to "Assigned" (from New for instance), the "assignee to" field is erased.
The user has to update twice the issue to assigned the correct person.

Here is an example of history message:
"
Assigned to Nicolas LOUIS removed
Status changed from New to Assigned
"

Here are my details environment:
Environment:
Redmine version 3.4.5.stable
Ruby version 2.2.3-p173 (2015-08-18) [x86_64-linux]
Rails version 4.2.8
Environment production
Database adapter PostgreSQL
SCM:
Subversion 1.7.14
Git 1.8.3.1
Filesystem
Redmine plugins:
scrum 0.18.0
squashtm 1.0.0.RELEASE

Thanks for your support.