new branch be noted message : you are not allowed to push code to protected branches on this project

i encounter a problem when creating a new branch,the new branch was named stable/test-011.when i click create branch button, i got such message :

and by my analysis, i find the problem maybe course by the branch protected or Wildcards support about branch protected.
i have a Wildcards branch protected in my project, like this : stable/*.

I am not sure whether this problem is a defect or bug. but i think i need to let your know this problem.
gitlab version info:
GitLab information
Version: 11.1.4
Revision: 63daf37
Directory: /opt/gitlab/embedded/service/gitlab-rails
DB Adapter: postgresql
URL: https://xxxx
HTTP Clone URL: https://xxxxx
SSH Clone URL: git@xxxx
Using LDAP: yes
Using Omniauth: no