Recent folder doesn’t update

Hi there

Hope you are doing well and thanks for reaching out.

I have tried to reproduce the issue at my end and the app is working fine. Please share the version of the iOS and the Acrobat App you are using? Tap on the profile icon > About Acrobat.

Also, try to log out of the app > reboot the device once and re-login to the app and see if that works.

Additional Information: For future reference and self-help,please check the help page https://helpx.adobe.com/acrobat/mobile-app-faq.html 

Let us know how it goes.