Quick question, it is possible to trigger a UE after updating children items? I have noticed that once the parent item is updated the UE is executed but then you are redirected to the page to choose which children you want to select, after that you can see a context of "mass update" on the system notes of the children, however no script is executed, I have enable all the context in the deployment, I'm not sure if I'm missing something or if there is a workaround for this.

No your UE scripts will not trigger on children if you edited the parent and then select the children on the second page, it's a PITA.

I see, thanks for confirming the limitation @NElliott