Thanks for reaching out to us for your concerns.
I would request you to kindly update to the latest available version of Adobe Acrobat DC using “Check for updates”
Also please send a screen recording video of the issue that you are facing to us at email@example.com
An error occurred while saving the commentFulton commented
I'm running Version 2019.010.20098 and I'm having the same issue. Resizing the window is a very basic function and the lag is very annoying. Please let me know when a fix has been implemented. Thanks.