Hey there.
We're working with Bryntum Scheduler on an Angular 9 project.
I am trying to drop events from scheduler to other elements (that are not bryntum schedulers).
In order to achieve this behavior, we've used Bryntum DragHelper.
We've found a problem is when the drop action is async (we're using async, we haven't tested the sync option to see if the problem occurs) and I have scroll period that is hidden by the Resource Column- the finalize function does not work.
I added a demo for you that I created based on angular 8 example.
For check it you need scroll right the scheduler, and drop event to red zone.