If you experience an issue with Sitekiosk, it may be related to an incompatibility with the Microsoft webbrowser control (which SiteKiosk Browser uses). This is different that the full version of IE. Please see if you can replicate your issue in the IE Webbrowser control test app:
For testing it in the Internet Explorer Webbrowser Control (outside / without SiteKiosk) you can download this ZIP and then execute the exe after extracting the files (you do not need to install anything):
The main key is that SiteKiosk does use the Internet Explorer Webbrowser Control of the installed Internet Explorer version.
Attached a PDF with the description how to test Web pages in the IE Webbrowser Control outside of SiteKiosk (with a little IE Webbrowser Control application)