Access Violation in OnCellValidate

I have AdvStringGrid 7.1.0 in Delphi XE4 in 32bit.

When I do a sample case of cell validation with the following line inside the OnCellValidate evert:

When I enter an invalid value and hit the Tab key I get the following error:  access violation at address 00000000 .....

The error does not occur when hitting Return or using the mouse.

Has anybody else seen this?

Thanks for reporting. We could trace & solve this issue.
Temporary workaround would be to assign a (dummy) event handler to TAdvStringGrid.OnKeyDown