Thank you for your help in this matter. I was able to replicate and isolate the behavior. This seems to be an Advanced Installer issue indeed. It seems that when not explicitly using the /exenoui
EXE UI level switch the pre-install prerequisites are launched using the command line from "Full UI" field. Even there is a silent EXE installation.
A fix will be available in a future version of Advanced Installer, thank you for bringing this to our attention. We will notify you when the fix will be out.
Until then, as a workaround, you can use a silent command line like this:
All the best,