I am using KendoReact Draggable and Droppable and we find a bug when using it. This bug even happen in the official demo.
The bug is described below:
When a droppable area is rendered out of the originall window size, the droppable cannot detect the onDragEnter() & onDropLeave(), of course onDrop neither.
it seems that kendo did not handle when user scroll while dragging the draggables, so that when the draggables was dragged to a zone out of the original window size, it failed to detect it.(Figure4)
I have also found another bug which is when you drag the draggables and scroll, the draggable will somehow detacted with the cursor, but I somehow already fixed it. Maybe it gives some hint for you to fix this bug, maybe.