Upload Failure via Apple File App

Hello :smiley:

i have a problem while saving edited pdf Data. After editing pdf with Apple File App the the pdf is not uploaded in MyCloud very often.
Operating system: IOS14.2 / IPadOS14.2
App: Apple Files App
Process: edited with Apples in-App tool (Apple Pencil)
Failure Code: FileProviderExtension.FileProviderError-Fehler 0.