unable to switch off Caps

[joanomy89]

Good Day,

Issue: The typing fonts were upper-case and unable to switch off capslock after caps button was pressed once.
Upon second pressed, the caps button was released and alphabet characters remain upper-case.

Operating system: Windows 10
Virtual Keyboard version: 5.11.1
Browser launched: IE 11

Any kind folks able to resolve this issue?
I've attached keyboard below (kiosk_kb.kbl).

Cheers,
Joan