diff --git a/app/views/exercises/external_users/statistics.html.slim b/app/views/exercises/external_users/statistics.html.slim
index 02e66537..d1ee55ac 100644
--- a/app/views/exercises/external_users/statistics.html.slim
+++ b/app/views/exercises/external_users/statistics.html.slim
@@ -34,6 +34,7 @@ h1
       datalist#datapoints
         - index=0
         - @submissions.each do |submission|
+          - next if submission.files.blank?
           option data-submission=submission
             =index
           - index += 1
@@ -56,8 +57,8 @@ h1
             - row_classes += ' within_grace_period' if this.is_a?(Submission) && this.within_grace_period?
             - row_classes += ' after_late_deadline' if this.is_a?(Submission) && this.after_late_deadline?
             tr data-id=this.id class=row_classes
-              td.clickable = this.created_at.strftime("%F %T")
               - if this.is_a?(Submission)
+                td.clickable = this.created_at.strftime("%F %T")
                 td = this.cause
                 td = this.score
                 td.align-middle
@@ -68,6 +69,7 @@ h1
                       .unit-test-result.unknown-result title=[run.file&.name_with_extension, run.output].join("\n").strip
                 td = @working_times_until[index] if index > 0 if policy(@exercise).detailed_statistics?
               - elsif this.is_a? UserExerciseIntervention
+                td = this.created_at.strftime("%F %T")
                 td = this.intervention.name
                 td =
                 td =