number keys don't work on left CDU

**Describe the bug**
typing numbers with my physical keyboard doesn't work on the CDU. The right CDU works though.

**To Reproduce**
try and type numbers on the left CDU

**Expected behavior**
Should be able to type numbers

**Screenshots**
N/A

**Desktop (please complete the following information):**
 - OS: Windows 10
 - X-Plane 11.50b15
 - Version 1.5.9cygnus7