Networked Computers - Email Icon Appears on Both Computers But Only Open on One.
Strange issue and hard to title this issue - Some background info - 2015 MacBook Pro and 2018 MacMini on a local network both with OS X 10.15.6 recently upgraded from 10.15.5. One Apple ID for our household. Each Mac device has Apple Mail accounts from gmail - wife with her separate Gmail email address and mine with a Gmail address as well. Mail preferences show each to be "imap". We store some things on iCloud Drive but not sure if the iCloud has anything to do with the following problem.
When either of us on our separate computers (both awake and running) open Mail and selects the "Compose New Mail" button to draft an email, an icon appears as soon as "Compose New Mail" is selected at the top of the Dock on the OTHER person's computer. Moreover, if the other person clicks on that icon on his/her dock, the draft email then is moved to the person's computer who clicked on that icon at the top of the dock - as if one is hijacking the other person's draft email. This was not an issue until recently. I don't know if there is a bug in the latest OS X release or if something I have configured in iCloud is the culprit.
Mac mini, macOS 10.15