Hi, I just had this issue with a table in App Designer. Have buttons to shift rows, and want the "Selected Cells" range to move as well.
In the end, I chose to store the cell indices in an App property variable (here: 'selected_cell'), and use my own highlighting, as per (for a table called 'Par_Table')
function Par_TableCellSelection(app, event)
app.selected_cell = event.Indices;
Then you can update the values in 'app.selected_cell' in other callbacks and call 'update_highlighted_cells' again.
Seems to update fast enough for me. Maybe someone already posted this work-around and I didn't find it.