Conditional Logic Webform Field Disappear

I've encountered this problem during test of webform module, in particular the webform example of conditional logic.
With the Bootstrap theme the form works properly, with Radix theme many elements are hidden (with display:none)

with bootstrap theme

with radix theme

Can be reproduced on simplytest.me:

• Launch sandbox with Webform + Radix
• Enable Webform Examples Module
• View the webform "Example: Elements: Condition Logic" (Bartik theme)
• Switch themes and watch the page