Number is stripped from Merge Request title on frontend
Summary
When Merge Request title is in form "NNNNN. Title text", while displaying Merge Request page, the leading "NNNNN. " is stripped from the title text. If I change the dot to other symbol (i.e. "NNNNN: "), it does not happen.
Although, the number is still there on the page with MR list, and on MR Edit page, so it happens only on frontend.
Steps to reproduce
Create new branch in project, create MR, name it like "12345. Some text". See that on MR's page there is no "12345. " in MR Title.
Example Project
What is the current bug behavior?
As discribed above, number is stripped from MR Title on the frontent on this page, but you can see it in other places, like MR list page
What is the expected correct behavior?
MR Title should not be mangled like described above while displaying on MR Page.
Relevant logs and/or screenshots
MR page, title is stripped:
MR list page, title is full:
Output of checks
This bug happens on GitLab.com
Results of GitLab environment info
Expand for output related to GitLab environment info
Reproducible on gitlab.com, and on my on-premise installation (ce 18.5.1). And also, in my installation, MRs which were created before migration to 18.5.1, do not have this problem.