Default Clipboard missing in some apps

I have a couple of apps that won't allow the clipboard to be used. The modal key doesn't show the clipboard button (or the voice button, either), and tapping in the text input field doesn't show the "paste" button.

These are financial apps, and I wonder if this is something that is built into them by the developer as an ill-conceived "security" feature, or if there's just something wonky going on in the custom ROM I'm using.

Anyway, is it possible to force the clipboard to be always be available, or does an app developer have final control over clipboard availability within their own app?

BTW- The clipboard used to work in both of these apps, but I don't recall if I updated them between the time it used to work and the time it stopped working.