Some of the subscriptions I have configured for a few of my filters are sending duplicate emails at the same time that I have designated them to be sent. I notice two things about this:
1. The results are different. One email has the most current filter results however the other one appears to contain results extracted at a previous time.
2. The bottom of these different emails have different messages.
a. The email with the current results has the following message:
"This message was sent by Atlassian JIRA (v7.5.2#75007-sha1:9f5725b)"
b. The email with the old results has the following message:
" This message was sent by Atlassian Jira (v7.12.3#712004-sha1:5ef91d7)"
We are running JIRA Server v7.5.2. This only started occurring about a few weeks ago and I don't believe there were any major changes to the JIRA instance we are running.