To experience the loss of selection, scroll beyond the predefined grid buffer zone (default is 5 pages).
Follow these steps to reproduce:
- Choose any item from the first page
- Scroll through each cached page until a new group of pages loads (scroll past the buffer zone) - typically set at 5 pages by default
- Your selection will be lost (indicated by the button label showing "Selected (0)")
ExtJS version being used: 6.7.0
Check out this live example