primefaces: DataTable: Multiselection with shift-click doesn't work after update

1) Environment

• PrimeFaces version: 6.2
• Does it work on the newest released PrimeFaces version? No - 6.2
• Application server + version: WildFly 12.0
• Affected browsers: Firefox

2) Expected behavior

After clicking entry a) of the datatable and then shift-clicking a second entry b), all entries from a) to b) should be selected, even if the DataTable has bean updated in the meantime.

3) Actual behavior

After first click, entry a) is selected. After updating the DataTable, still a) is selected, this is OK. But after shift-clicking b), all entries from the first row to b) are selected.

4) Steps to reproduce

With the example, select one entry, wait a second, then shift-select another entry

5) Sample XHTML

Just use the “Multiple with Meta and Shift keys” example from: https://www.primefaces.org/showcase/ui/data/datatable/selection.xhtml

and add the following line to make it update the DataTable, this issue is not just related to the <p:poll> component, it could also be updated with a button or anything else: <p:poll interval="1" update="multipleDT"/>