CF 6.0.9 - Events are not triggered when selecting value 0 in radio box

Hello

I have a radios group with two options (0=No, 1=Yes) and a few events triggered by the selection of these values.
There is no preselected value, no ghost value and it's a required field.

The events that are set as "on selecting value 1 do..." are working fine; the ones that are "on selecting value 0 do..." are not being triggered at all.
If I change the second type of events to "on unselecting value 1 do...", they are correctly triggered.

I am almost sure the same configuration used to work fine on CF 6.0.6

Best,
Mattia