When I interact with items in my 1Password.eu vault, they are marked as modified although I have not changed anything.
By "interact" I mean, open for example a password item, tab on it and click reveal. The "modification" however does not happen immediately, but only when the app is force-quit or (I suppose) when iOS freezes it.
I can reproduce this pretty easily:
1Password Version: 7.2.8
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: 1Password.eu