When running a compiled Process (.exe) containing a custom dialog, the icons (tooltip-icons, icons needed by the date-selection util etc.) inside the custom dialog are not displayed at all - like in the image above.
Workarounds / Resolution
Before running the affected compiled Processes, you need to make sure that you have copied over the .dll called WinAutomation.Shared.Runtime.JsNativeResources.dll (no renaming allowed) in the same directory that the .exe resides. This dll can be found in the installation folder of WinAutomation.