I'm on Qlikview server 11.2 SR16 and experiencing this bug.
A similar issue appears to have been fixed as part of SR15 but this does not apply to opening apps on Accesspoint.
Open URL action changes upper case values to lower case in QlikView 11.20 SR14 Jira issue ID: QVII-1182 Description: Using the Open URL action causes upper case values to be changed to lower case values. This bug is specific to QlikView 11.20 SR14 and does not appear in previous versions.
This is not just an annoyance for us as we have existing apps using the =DocumentName() formulas expecting the correct case!