Note: This is not about the preview pane that appears when you tap on a file name.
It is, however, about the persistent empty preview pane that appears each time you launch the app, regardless of where you are in Dropbox, before you tap on anything.
This has made using the app in vertical (portrait) challenging—read: nearly impossible—when split screen is required to access a second app. The persistent preview pane forces file names to cram themselves into a narrow area, truncating the bulk of the text.
Please tell me there's a setting to turn off this preemptive persistent empty pane. Tapping on a file name to open a pane is more than sufficient.
Photo: 13" iPad Pro with badly truncated file names before tapping on a file (i.e. no file has been opened). Before the recent update, file names extended the full width of the Dropbox window, including the yellow area.