Alright, thank you for the clarification!

Hello allCurrently I'm trying to accomplish the following scenario:The client I'm working for has different websites, created by different providers on AEM. We are currently building some components that use ECMASCRIPT 6, meaning we'd have to use the Google Closure Compiler for this. I'd like this c...

Yes I can understand that, but that was not what I asked. I asked if you're editing the properties via the editor.html or via the sites.html UI

And you're certain that the replicator gets triggered to delete it? Because you have an if-statement that surrounds that replicate method. Perhaps check in your debugger if it actually gets triggered or not.

Did you have a space between the property, the @ and the context='uri' ? Because in the snippet you provided, I don't see one. Not sure if it's necessary to have one, but I always did it like that.

No, you do not need to add it to the template, but to the design./etc/designs/<your-site><jcr:content  jcr:primaryType="nt:unstructured"  jcr:title="Your custom Design"  sling:resourceType="wcm/core/components/designer">  <your-template-name jcr:primaryType="nt:unstructured">  <par   jcr:primaryType...

Are you trying to edit the properties in the editor or in the UI you get when you select the page in the sites.html/content/... and click on edit properties?

I see you're using this eaem-nested property, probably from this link? Experiencing Adobe Experience Manager - Day CQ: AEM 62 - Touch UI Nested ( Multi-Multi ) Composite Multifield storing da…  Please note that when trying to save this, you do need that specific javascript file available. I don't th...

Could you please provide us with the dialog of your page?

Try adding component groups as allowed components, like in the second like I've provided to you.