Unable to change default radio button in button group
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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.
Cris LaPierre on 27 Sep 2021
Edited: Cris LaPierre on 27 Sep 2021
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.