Hi @who3,
Thank you for visiting the HP Support Forums! 🙂 I see your HP Officejet Pro 8600 printer loses the wireless connection, when you check the printers status it is showing as 'Offline'.
I would like you to run the HP Print and Scan Doctor > www.hp.com/go/tools
-- It was designed by HP to provide users with the troubleshooting and problem solving features needed to resolve many common problems experienced with HP print and scan products connected to Windows-based computers.
If you are still getting the error message please continue here: 'Offline' Printer Status Message Displays (Windows 10)
What are the results when you set a Static IP Address? Let me know the outcome. I look forward to hearing from you.
Thanks for being a part of the HP community. Please let me know if this helps resolve the issue by marking this post as "Accept as Solution" . If you require further assistance let me know and I will gladly do all I can to help. If you wish to say "thanks" for my effort to help, click the "thumbs up" to give me a Kudos.
HevnLgh
I work on behalf of HP
Click the “Kudos Thumbs Up" to the left of the reply button to say “Thanks” for helping!