Retry failed in MR view results to 404

In GitLab 8.8, if you have a failed build in our MR and you click on "retry failed" it results to 404. I can reproduce it on gitlab.com:

• artem-sidorenko/chef-rkt!27 (merged)
• I go to build: artem-sidorenko/chef-rkt!27 (builds)
• I click 'Retry failed'
• Failed build is retried
• I get redirected to the following URL: https://gitlab.com/artem-sidorenko/chef-rkt/pipelines/3404467/retry and see 404

Probably this is related to a pipeline introduction..