Split cell does not inherit kernel of parental cell

[BoPeng]

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In case of two cells with kernels,

sos
R

if I split the R cell, the top cell would inherit the kernel from the sos (because it is a new cell), not the cell before split.

[BoPeng]

Copy / paste of cells do not copy such information also. Actually the information might be there but we do not update the cells with the creation of new cells.

[BoPeng]

The situation is that the new cell, that is the top half of the existing cell will look for its previous cell for the kernel to use, because it does not know it is being "split". If the previous code cell is R, then split will be successful.