data tab auto refresh

1. data tab opened, on table vith cols A and B
2.having WORKING trigger that fills B on before insert
3. insert row, fill a, defocus new row, row is saved.
4. Have to manual refresh data tab to see the cahge by my trigger, that should be automatic (refresh after trigger action), I guess.

No, HeidiSQL cannot know about potential trigger based manipulation of the row. There was a same discussion in the issue tracker recently.