Quantlib objects not created outside 65,356 row range

[Gavin08]

Dear community,
I stumbled upon what seems to be a bug to me:

In Excel 2010, when I try to create schedule or bond objects within cells on row 65,357 or above, the objects are actually not instantiated and cannot be used by other functions.

I could reproduce this issue on a second PC. The same cell formulas used on rows below or equal 65,356 worked fine.

Can somebody confirm this is a bug?

Regards
Gavin