Issue Setting Tooltips

I am receiving an error when I try to set a tooltip after loading a CSV file. The grid loads the data and presents it without a problem, but I receive the error below when trying to set the tooltip.

The error I recieve is Line: 152 Char: 457 Error: ‘_childIndexes’ is null or not an object Code: 0

If I replace physGrid1.load(“g.dat”,“csv”); with physGrid1.parse(“1,a,b,c\n2,d,e,f”,“csv”);
then when I try to set the tooltip with physGrid1.cells(1,1).setAttribute(“title”,“Test”);
it works fine but I need to load from a file.

Below is the code and csv file. I would appreciate it if someone could tell me what I am doing wrong. Thank you.

Test Grid

g.dat csv file contents:

Unfortunately the issue cannot be reconstructed locally.
Setting an attribute in case of loading from csv file.
If issue still occurs - please, provide a complete demo.