Radio button control issue, is it a bug?

[Aaron3Sixty5]

Hi Power Apps community!

I've run into what seems like a bug.  The radio control is 'remembering' the previous selected item under certain conditions.

SharePoint has a choice column, RadioBtn, set to radio button, with three choices, "once, twice, thrice" and no default:

In PowerApps/Customize Forms, I added the radio control to the RadioBtn data card below the combo box, set the Items property to the same as the combo box:  Choices([@radioButtonToPowerappsTest].RadioBtn), and set the Default property to ThisItem.RadioBtn.Value:

When I browse through each option, the default is shown correctly at first:

Click test2:

Click test 3:

But as soon as I click the first record with a blank RadioBtn, it 'remembers' the previous selected option, even though it is quite clear Thisitem.RadioBtn.Value is indeed blank:

If I click the next item, 'test another blank', only then does it correctly show nothing selected:

Then if I click item test 1a:

and follow that with clicking 'test another blank':

If I keep clicking 'test another blank' I get same as above.  Only until I click 'test blank' the radio button options clear:

I'm sure there is a method to 'reset' or force this control to behave; I'll work on that later today.  But this certainly appears like buggy behavior...however I'm probably doing something wrong so please let me know!

Thanks,

Aaron

[v-xiaochen-msft · Accepted solution]

Hi @Aaron3Sixty5 ,

Please try to use this formula on Default property of radio cotrol:

If(!IsBlank(ThisItem.RadioBtn.Value),ThisItem.RadioBtn.Value,"")

The result is as follows:

Best Regards,
Wearsky
If my post helps, then please consider Accept it as the solution to help others. Thanks.