Barcode Scanner Input failing on BRADY scanner

I am attempting to use the perspective Barcode Scanner Input with an android-based BRADY scanner. In preview-mode, I can successfully get the data to show by typing with my chosen prefix & suffix.

When I use the app on the scanner, however, the data doesn't update. I can scan a barcode into the notes app and it has the appropriate prefix & suffix. But when I go into Perspective and scan the barcode, the data doesn't update.

I know I could use a focused text field, but that is problematic because the device's keyboard pops up every time the text field is focused. Besides the fact that I have to count on the user to keep the text field focused. It just generates a lot of opportunity for user error.

Does anyone know a fix for this issue?