M2 Bug - Collected Sales - Applied Payment - Split Payment

Defect Details:

Steps to Reproduce:

Using store 00198 navigate to Customers -> Collected Sales
1. Click the "Apply to Invoice" Button
2. Select Customer with multiple invoices -> Continue (DaySpring Cards)
3. Deselect one of the 'Applied to Payment' checkboxes
3. Actions -> Split payment
4. Search 2nd Customer (Farmington PTA) -> Continue
5. Actions -> Apply Updates

Expected Result:

The modal is suppose to show both customers (DaySpring Cards and Farmington PTA)

Actual Result:

The modal only displays the customer that is displayed