I have installed the DTTG update from today. I am using legacy icloud sync. The new DTTG update shows me 1 pdf in the “ghost-document” intelligent group. I see the thumbnail (0 file size). It was added on 8th January 2021 (I do not remember if I have added it on the mac or on the iphone then). I can open it on the mac (there I have no 0-file-size documents) but not on the iphone. I deleted it on the iphone. I cleaned the trash on iphone and mac. I was able to restore it from my mac. Just in case this information helps @eboehnisch. Is it safe to continue working with DTTG and DT for the moment? Or might it be that such 0-filesize documents reappear during sync process or database use?