I have a problem that a few issues get a random label assigned.
This happens in all Jira project, does not matter if Software, Service Management or Work Management.
In the beginning it was kind of fun to have these labels assigned randomly, but in the end I would like to get rid of them.
In the screenshot you can see that there is no change related to the label.

Is there any way to see where this label comes from?
I already deleted a few of these random labels, hoping they would just stay away. But they are like a boomerang 
We have an app included in our environment (Backbone Sync), so we can sync some issues with another environment. But in the configuration, labels are not being synced.
Someone has an idea where they come from and how I get rid off these?