It is an Eclipse Bug that occurs together with IE 11.0.12 and lower. See https://bugs.eclipse.org/bugs/show_bug.cgi?id=444005
The bug is automatically fixed by upgrading to IE 11.0.13 trough Windows Update or by manually installing the update KB2987107.
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You can also try to fix settings the internal Browser to run in Legacy mode (with IE 10). Therefore you have to go to the windows registry and set or modify the entry:
Computer/HKEY_CURRENT_USER/Software/Microsoft/Internet Explorer/Main/FeatureControl/FEATURE_BROWSER_EMULATION/Axon.ivy Designer.exe Designer.exe
Set the value to Decimal 10000**Decimal 10000** and Axon.ivy Designer internal browser emulates IE 10.
![browser emulation registry editor][1]
See the following references for more details: [change emulated IE version][1] version][2] or [Configuring IE emulation][2]emulation][3]
[1]: http://answers.axonivy.com/upfiles/browserEmulationRegistry.png
[2]: https://support.askia.com/hc/en-us/articles/200011472-Change-the-version-of-Internet-Explorer-in-askiadesign-s-web-test-mode
[2]: [3]: http://www.codeproject.com/Articles/793687/Configuring-the-emulation-mode-of-an-Internet-Expl
