Issue with Virtual column

[Boa_Casa]

Hi,

I have created an app for expense management. Where in I have two tables as below :

1. Income table : In this income for a given month across people is maintained.

2. Bank statement table : In this table expenses across a month are displayed along with contribution of each person against the expense based on income from income table

In income table I have an virtual column in which I want to track saving against each person based on sum of contribution from the bank statement table.

The issue I am facing is that the virtual column in income table which shows the sum of contribution against a person based on expenses from the bank statement table is not showing any value where seen in table format but when I edit the row in form I am able to see the correct values. Attaching the screenshot for better understanding.

If someone can help me understand on why this is happening?