Thanks for your reply Rosen, but the issue is still not fixed. I tried to use your fixed on activate event but the columns are still missing.
I have 3 columns.
col1 | col2 | col3 (col 1 is set to frozen)
then I went to tabstrip 2, I refreshed the grid from tabstrip 1 (using $("#Gridname").data("kendoGrid").dataSource.read() ) to update the grid. then returned to tabstrip 1 and the col1 is missing. It is the same on my other grid at frozen columns.