Hello,
You can reproduce the bug here https://www.bryntum.com/examples/grid/groupedheaders/. You just need to add the feature filterBar to the features and this :
grid.store.addFilter({
property: 'firstName',
value: 'D',
operator: '*'
})
grid.store.addFilter({
property: 'id',
value: '1',
operator: '*'
})
You can see that the filter value '1' is shown but not 'D'.
Regards,
Artbil