RSSP: Line level condition is not working in Visual Builder Studio

I'd like to make "Justification" of a header field mandatory when the "Urgent" flag is enabled.
This condition worked expectedly in case we enable the "Urgent" flag in a header level, but it doesn't work in the case of line level.

Is there any way to make "Justification" in header level required if one of the "Urgent" flag in line level is checked?

*The Japanese character means "Urgent".

The Justification field is not set as “Required” even after set one of the lines as “Urgent”: