Select one field list logic error even if no follow-up question is specified

[lognaturel]

Create a group. Place a select one in the group. Toggle the "display on one screen" checkbox on the group.

[florianm]

@lognaturel I'm getting the same error, however upload to ODK-A still works, and ODK Validate also finds no problem. ODK Build shows the select one field in red with the following warning:

[ ] Follow-up Question
Ask if the response is:
(inactive, but a value is selected)
    Because this control is within a single-screen group (field list), any expressions that reference other fields in the same group will not work.

[florianm]

Found a fix: dragging the falsely red-flagged "select one" to another position within the group will turn off the warning. Dragging it back to the original position will preserve the "ok" status.

The warning itself is legit - follow-up fields will not work inside a "keep on one screen" group as both the select one and the follow up fields render together (makes sense to me).

[issa-tseng]

Okay, the issue here is that it genuinely is supposed to be a warning and not an error, but right now there's no visual distinction between the two.

[florianm]

Currently, the warning around "follow up question" and the widget colour disappear only after the widget has been dragged around. It would be great if it would disappear when the "follow up question" checkbox is unchecked.