Career Site issue when we applying the job

Summary:

Hi Expert,

Problem/Corrective issues Unable to select the question while applying the job

Please see the attached videos. The Yes/No buttons on the candidate application are clickable, but they do not remain selected or highlighted.

When I attempted to submit the application without selecting the buttons, I received the error shown below. However, after clicking the appropriate answers for each question—despite the buttons not staying highlighted I was able to submit the application successfully.

Ideally, these buttons should be selectable and remain highlighted so the candidate can visibly confirm their responses.

When I disable the Custom CSS it's working, but we can't disable the permanently , can some one help for debagging the Custom CSS or If someone can suggest whom should be reach?