Redmine

It is a nice feature to adress tickets with a double hash, followed by the ticket id, like here:

Defect #14269: custom field not displayed but not in read only

We have the issue, that the suggester works fine ...

... and when we hit return, an auto-correction reduces the textile code to one hash:

So the deliberate entry is lost.

Any idea whether this is a bug?

Environment:
Redmine version 5.0.5.stable
Ruby version 2.7.5-p203 (2021-11-24) [x86_64-linux-gnu]
Rails version 6.1.7.2
Environment production
Database adapter PostgreSQL
Mailer queue ActiveJob::QueueAdapters::AsyncAdapter
Mailer delivery smtp
Redmine settings:
Redmine theme Default
SCM:
Subversion 1.13.0
Mercurial 5.3.1
Cvs 1.12.13
Bazaar 3.0.2
Git 2.39.2
Filesystem
Redmine plugins:
no plugin installed