I have commented your issue at http://www.madeira20.com, but here you have the answer too:
These traces are not created by the plugin. They are Universal Plugin Manager notifications.
Maybe you check the "propertyentry" table in the Jira database server with the query:
SELECT * from propertyentry WHERE property_key like '%notifications%' and property_key
We don't have the control of these notifications and we aren't sure of which is the best way to remove them.
There are some solutions in atlassian answers but we can't guarantee their results. Please check these links:
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