OCR is not detecting zero numbers

Hi, 

from several days OCR is not correctly detecting zero numbers, and it is replacing zero with O letter.

Eg:

it is detecting

O3:O5:OO AM 

instead of 

03:05:00 AM 

that is the value within the web page.

It is happening also using OCR from the Record Script functionality, and not only by using the Recognize method.

Is anyone else facing this issue?