So I am on Jira Server 8.5.4 with Jira Automation plugin 7.3.5.
I have the following rule setup:

The Audit log shows success that it commented on the issue but when I look at the issue the size is missing. Just has the following comment:

I have two linked issues and when I remove both of them then the rule will not add a comment so I know it is running the rule and it can recognize that there are linked issues but it won't print out the number of linked issues in the comment.
If anyone knows what I have messed up I would really appreciate some input.