GitLab API POST call (tag - create a new release) returns 404 Tag not found

Summary

GitLab API POST call (tag - create a new release) returns 404 Tag not found

Steps to reproduce

1. Create new repository tag with use of GitLab Web API with an empty release note
2. Try to use REST API call to create new release note
   POST /projects/:id/repository/tags/:tag_name/release
3. {"message":"404 Tag Not Found"}
4. Create new release note for selected tag with use of GitLab Web API
5. Try to use REST API call to update release note PUT /projects/:id/repository/tags/:tag_name/release
6. Works as expected

I tried different test approaches (Postman, Powershell) with the same the result:

• The same client code works as expected with PUT (update)
• The same client code doesn't work with POST (create)

What is the current bug behavior?

{"message":"404 Tag Not Found"}

What is the expected correct behavior?

Release note should be added into tag

Relevant logs and/or screenshots

Output of checks

Results of GitLab environment info

GitLab Enterprise Edition 9.0.4-ee gitlab-ee@349b042ecfdba96be85b32a50f16ed81b18db392

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)