HintShowCells issue

Maybe I miss something, but since the last couple of versions, I have issues with HintShowCells. Whenever I move the mouse over a cell, the hint appear for 1/10th of a second (just like a flickering) and then vanish. The hint only popup in maybe 1 of 10 tries properly.

I need to display hints when the mouse move over cells, but just cant anymore.

I am using 64 bit, Delphi 10.1 Berlin, Windows 10

I retested this here with the latest version of TAdvStringGrid with a default grid on the form and the code:

procedure TForm1.FormCreate(Sender: TObject);
  advstringgrid1.HintShowCells := true;
  advstringgrid1.ShowHint := true;

and I cannot see such issue.
What's different in your app?