I've created a ticket for this, but I'm not sure it's actually possible to fix at the moment, and since we'll be switching to a new architecture later this year, it probably won't happen before then. Sorry for the inconvenience. If this is your own computer, you of course have the option of just leaving Zotero open.

Now that Zotero 5 has been released, I would like to support this enhancement request. Hope, the matter can now be given new consideration.