ADF on new printer behaving strangely, not stable at all

[anduser]

The new printer was just brought last week. I scan from hp easy scan on my Mac and I chose the model as it has duplex adf. However, a few days later it stared to behave strangely and the performance is not stable at all. When I scan a 10 pages of paper, the adf scan the first 5 pages then stop! There are no warnings or error on the printer and apparently it thinks the scanning is completed when there is still 5 pages of paper remaining in the adf. Sometimes the a few pages are missing (e.g. I have a 10 page doc and after the scanning is completed I saw only p.1,2,3,4,5,9,10 on my Mac, where p.6-8 is missing). Sometimes the last page of pile of the documents in adf is not scanned (e.g. I have 10 pages of doc printed on 5 pages front-and-back, when I insert the 5 pages of paper, the first 9 pages of doc are scanned and the last page of the doc is missing, when I collect the 5 pages of paper from the output tray in the adf, I saw the last page is also flipped, showing the the scanner did flip the final page over but don't know why didn't scan it.) All scans is eventually normal when I repeat three or four times. This is extremely annoying and hinder my workflow. Imagine you have to scan 3 or 4 times for the same doc every time you scan! What's wrong with my new printer?

[Jay_G24]

 Hi @anduser,

I'd like to help!

Try the below suggestions -

Try updating mac and printer firmware

To update the printer's firmware, refer - HP Printers - Updating or Upgrading Printer Firmware 

 To update Mac, try these steps - How to update the software on your Mac

Uninstall HP smart and install the HP Smart app from the App store and then try scanning.

You may try and install HP Easy start and try and scan using the same,

You may refer to -How to scan with an HP printer

Hope this helps! Keep me posted. 

And, Welcome to the HP Support Community. 

Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.

Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping