Hope you are doing well and sorry for the trouble.
Is this an issue with a particular PDF file or with all the PDFs? Please try with a different PDF file and check.
What is the version of the Acrobat DC you are using? To check the version of the application go to Help > About Acrobat and make sure you have the recent version 23.01.2006x installed. Go to Help > Check for updates and reboot the computer once.
Also what is the make and model of the scanner, check for any missing/pending updates for the printer/scanner driver and firmware and try updating it.
If you have selected , 2-sided scanning, the machine scans both sides of the document. This may cause a blank page to occur while scanning.
Please try to repair the installation of Adobe Acrobat from the help menu (Win Only) and see if that works.
Please try to reset the Acrobat preferences as described here https://community.adobe.com/t5/acrobat-discussions/how-to-reset-acrobat-preference-settings-to-defau...
Let us know how it goes.