Markdown bug when rendering titles

Since the deploy of 8.7.0-rc1, there seem to be a Mardown bug while rendering titles: https://gitlab.com/gitlab-org/gitlab-ce/blob/v8.6.4/doc/update/8.5-to-8.6.md

The weird thing is that it seems to detect ### 1. as a reference to the #1 issue!

Added markdown label

/cc @DouweM

Closing in favor of #14936 (closed).

Status changed to closed

mentioned in issue #14936 (closed)