Just look out for any damage to the fins of the Cory, my dwarf gourami can do the same when I put catfish pellets in. It’s usually just a way of making them move so the gourami can get to the sunken food. Any signs of torn fins you might have to separate and treat for infection
Get some more pearl gouramis to distract it from the corydoras. Add some more hiding spots for the corys. Also, you mentioned you had Tiger barbs. Tiger barbs do best in larger groups. Also how many corys do you have? That might effect it.