Binding is not working properly when using custom delegate and Generic EventHandler for respective properties

### .NET version

Net 6.0

### Did it work in .NET Framework?

No

### Did it work in any of the earlier releases of .NET Core or .NET 5+?

_No response_

### Issue description

The Binding is not working properly when using events with Custom delegate and Generic EventHandler delegate for respective properties.

The Binding is working Properly when using EventHandler delegate

### Steps to reproduce

sample: https://github.com/GokulThanu/testingsamples/tree/main/Binding%20Issue-detailed/Binding%20Issue

Steps to reproduce

Run the sample
Enter any Number in Custom control
Note that the last textbox is alone updated.

Observed
The last TextBox is alone updated with the value entered in the CustomControl

Expected
All TextBox is to be updated with the values entered in the CustomControl