Cannot create a literal "backslash underscore" sequence

NOTE - This was escalated from https://support.atlassian.com/browse/JSP-21339

This is related to CONF-2594, although that issue only talks about the Noformat problem.

I have a number of tickets that refer to some filepaths that have backslashes immediately followed by underscores. No matter how I try to escape this, JIRA does not display it correctly

example: folder\folder\ _filename.txt — I put an extra space before the underscore here to show you, since it won't display it otherwise.

I've tried double & triple backslashes, noformat, etc.

One backslash, one underscore:
folder_file.txt

Double backslash, one underscore:
folder
_file.txt

Triple backslash, one underscore:
folder\\\_file.txt

Noformat:

One backslash, one underscore:
folder\_file.txt

Double backslash, one underscore:
folder\\_file.txt

Triple backslash, one underscore:
folder\\\_file.txt