Issue with shortcodes

[peterfarrant]

Apologies for another issue - but this is a really great tool and assistance from yourself has been most helpful

I have mentioned previously we use Hugo as a static website generator which builds using goldmark markdown

It allows 'shortcodes' to enable some special features and these seem to be getting mucked up
I am using the plugin ghfm as seems closest so far to goldmark

The shortcode format has the syntax
{{< label [optional parameter] >}} [optional text depending on use] {{< /label >}}

It appears to be going well in terms of it extracts the ext for translation - this includes the shortcodes (which I think with some work on a plugin I could get excluded - but not had chance to investigate yet)
BUT when writing it out it adds an extra \ in the shortcode

So comes in for translation is:
{{< hint tip>}} hello {{< /hint >}}

When it then generates the output afterwards it writes (see the extra \ in opening and closing shortcode)
{{\< hint tip>}} hello {{\< /hint >}}

Is this intentional - or an unexpected side effect of fixing some other issue?
I cannot think of a reason for adding a \ after {{
(Short term it is easy for me to do a global search and replace on the output to remove the )