mailto URI in markdown causes Internal Error 500
On updating from 9.1.2-ee.0 to 9.1.3-ee.0 hosted and also on gitlab.com rendering of
mailto:// URIs causes Internal server 500 error.
I believe this could be related to the changes related to 29374 (closed)
Steps to reproduce
Add the following to any markdown file e.g. readme.md
What is the current bug behavior?
Internal Error 500
What is the expected correct behavior?
Relevant logs and/or screenshots
Output of checks
This bug happens on GitLab.com