Verified below scenarios on LB and those are working as expected.
Verify Bulk recalculation
Recalculation By selecting employee
Recalculation By using employee where he has changed multiple classes and has multiple rates
Recalculation By only selecting rate without selecting plan and recalculating.
also verified other areas like Recalculate credit pool, Recalculation of Health tier and those are also working as expected.
All scenarios are working as expected on Production.