The changes I make on OneDrive docs from the Acrobat App are not saved.

Every time I try to change anything on a doc. opened from OneDrive on the Acrobat App, it doesn't save the chages. Instead, it creates a copy of that doc. with whatever changes I've made and save it on the device (Ipad 9th Gen.). 

I've uninstalled the Acrobat App, deleted my OneDrive account from the Acrobat App and linked it again and it still does not work. 

This doesn't happen with any docs. I open from my Google Drive account, only with OneDrive. 

Thanks in advance for the help!