Integration with iOs Files app dropping out

For what it’s worth, I have the exact same problem. It has been driving me nuts for over a year. It happens with the Files app, iOS email, Adobe Acrobat, and office 365 apps.  It happens on my new iPad Pro, my old iPad, and my iPhone. It has happened across the last year‘s worth of iOS updates. The only way I have found to restore the connection manually is to close both the Dropbox app as well as the app trying to access Dropbox and then restart the device. It will usually reconnect at that point. The frequency of the disconnects seems to be getting faster making it harder and harder to use dropbox as a storage platform.

I hope dropbox support is looking at this considering it appears to be a widespread and long ongoing problem. Unfortunately, it has become such a hindrance that I am starting to make plans to convert from dropbox to Google drive which does not have the problem.