@Pauline: Thank you for looking at the issue! I experience exactly the same. No trace of the script in the console, even for the simplest scripts (tried adding a "hello world!" script for debugging). As we are not using Power Pages, I think we want to avoid that for the time beeing, and rather see what support says.
@Daniel. The script is placed at the bottom of the head-section, above the </head> tag. The script is not deleted, but simply ignored. The script works perfectly on RTM Marketing forms, but not on a RTM event registration form. Is it a RTM event registration form you've tested on?
in which part of the email did you add the script? In the past I was able to add scripts where I want and just added a "script part" at the end of the form. At this moment these scripts are deleted during saving process automatically, but placing them into the header worked fine for me.
I have tried it out as well now and i experience the same issue. The script is not deleted in the html but it is simply ignored when opening the form on the browser. I also cannot find the script in the developer console of the browser. Maybe it is a bug and you should create a support ticket? I don't think it should work that way.
Or have you tried with Power Pages?
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