I had a radio button with a list of 5 countries and the option of Other was available.
I had 3 fields with conditional options where the condition was based on the radio button field.
It worked o.k. in chrome but it did not work well in Edge, Firefox and mobile browsers.
When I created another field for the other option and added an option of other in the radio button, everything worked o.k.
I think that there is a javascript bug in the radio button field with the Other option.