Hardware keyboard MC3300 doesn't work in EB

I have a problem with the MC3300 mobile scanner.

Typing with the hardware keyboard, it's impossible to get the second and third character of a button.

It always types the first character in the text field.

In android and other apps everything works fine. Just in EB 1.8 i get this behavior.

Also when i point my start page to the google website.

Anyone a tip to solve this problem?