MaterialRadioButtonGroup allows multiple selects and unable to deselect first option.

[alistairdyer]

🐛 Bug Report

Using MaterialRadioButtonGroup

<material:MaterialRadioButtonGroup Choices="{Binding items}" />

I am able to select more than one option.
I am unable to deselect the first option but can deselect other options. The first option is always selected.

Expected behavior

Can only select one option, automatically other options are deselected.

Reproduction steps

Xaml
<material:MaterialRadioButtonGroup Choices="{Binding items}" />

ViewModel
public List items { get => this.myItems.Split(',').ToList(); }

this.myItems is a string and is currently set to:

"663703a2-7de8-4f32-81a4-9494ca6daa10,773703a2-7de8-4f32-81a4-9494ca6daa10"

Configuration

Version: 1.5.8

Platform:

• 📱 iOS
• 🤖 Android
• 🏁 WPF
• 🌎 UWP
• 🍎 MacOS
• 📺 tvOS
• 🐒 Xamarin.Forms

[alistairdyer]

Below are the screens highlighting the issue.

Step 1:

This is correct, I don't want anything highlighted initially

Step 2:

I can successfully pick an option, this is correct

Screen 3:

This is the bug, I can select more than one option from the list

Screen 4:

I am now unable to unselect the option that made in Step 1, if I select option 1 I am still unable to deselect option 2