Unable to change default radio button in button group

I am building an app in appdesigner which contains a Radio Button Group. I recently decided to add a new radio button option to the button group and want to set it as the new default value on startup. I did this by copying and pasting an existing button. In the Component Browser the new radio button is listed as a child of the button group in the same list as the old buttons.

The problem I'm encountering is that when I try to select the Value checkbox for the new radio button, it automatically changes it to one of the others. Why would this be happening, and how can I fix it? As far as I can see, all of the properties visible in the Inspector tabs are the same for the old and new buttons.

Answer 1

[Cris LaPierre]

I discovered that your workflow works for a brand new radio button group. However, once I close the app and reopen it, if I try to add another button, I see the behavior you report. I tested in R2019b, R2020b, and R2021b. This looks like a bug to me. Please report it here.

In the meantime, the workaround might be to recreate your radio button group with all the buttons.

[David K]

Thanks - submitted! FYI, I found an easier workaround to just set the value programmatically in the startupFcn.

[Cris LaPierre]

Good idea.