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

[GokulThanu]

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

.NET version

.net6.0

Did it work in .NET Framework?

No.

Steps to reproduce

Please find the simple sample in the below github link

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

• 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

[KlausLoeffelmann]

Can you please create a bug issue in the repo for this, and describe the issue with a bit more detail and ideally with a few screenshots?