Custom Picker field(1st filter) filter is not working properly when performing multiple search using check/uncheck the checkbox (2nd filter)

I am using CustomPicker Interface inside main interface :

rule!CustomPicker(
pickerLabel: "Emp Id",
labelPosition: "JUSTIFIED",
placeholder: "--- Search EMP ID ---",
maxSelections: 1,
identifiers: touniformstring(local!empIDFilter),
choiceLabels: touniformstring(local!empIDFilter),
selectedValue: touniformstring(local!empId),
saveInto: {
local!empId
}
)

rule!CustomPicker

a!pickerFieldCustom(
  label: ri!pickerLabel,
  labelPosition: ri!labelPosition,
  required: ri!isRequired,
  placeholder: ri!placeholder,
  instructions: ri!instructions,
  maxSelections: ri!maxSelections,
  readOnly: ri!isReadOnly,
  requiredMessage: ri!requiredMessage,
  helpTooltip: ri!helpTooltip,
  validations: ri!validations,
  disabled: ri!isDisabled,
  showWhen: ri!isShowWhen,
  suggestFunction: rule!CustomPickerSuggestion(
    filter: _,
    labels: ri!choiceLabels,
    idenifiers: ri!identifiers
  ),
  selectedLabels: if(
    count(
      if(
        isnull(
          ri!type
        ),
        wherecontains(
          ri!selectedValue,
          ri!identifiers
        ),
        wherecontains(
          cast(
            ri!type,
            ri!selectedValue
          ),
          cast(
            ri!type,
            ri!identifiers
          )
        )
      )
    )<1,
    null,
    a!forEach(
      items: ri!selectedValue,
      expression: 
      rule!getArrayPickerLabel(
        identifier: tostring(fv!item),
        labels: touniformstring(ri!choiceLabels),
        identifiers: touniformstring(ri!identifiers)
      )
    )
  ),
  value: if(
    count(
      if(
        isnull(
          ri!type
        ),
        wherecontains(
          ri!selectedValue,
          ri!identifiers
        ),
        wherecontains(
          cast(
            ri!type,
            ri!selectedValue
          ),
          cast(
            ri!type,
            ri!identifiers
          )
        )
      )

    )>0,
    ri!selectedValue,
    null
  ),
  saveInto: {
    a!save(
      ri!saveInto,
      rule!ArrayPickerRemoveDuplicate(
        array: save!value
      )
    ),
    ri!additionalSave
  }
)

rule!CustomPickerSuggestion

with(
  local!matches: where(
    apply(
      search(
        ri!filter,
        _
      ),
      ri!labels
    )
  ),
  'type!{http://www.appian.com/ae/types/2009}DataSubset'(
    data: index(
      ri!labels,
      local!matches,
      {}
    ),
    identifiers: index(
      ri!idenifiers,
      local!matches,
      {}
    )
  )
)

rule!getArrayPickerLabel

index(ri!labels,wherecontains(ri!identifier,ri!identifiers),{})