diff --git a/app/controllers/contestants_controller.rb b/app/controllers/contestants_controller.rb
index 304144e..0d71185 100644
--- a/app/controllers/contestants_controller.rb
+++ b/app/controllers/contestants_controller.rb
@@ -221,6 +221,7 @@ class ContestantsController < ApplicationController
     @contest = @contestant.contest
     @puzzles = @contest.puzzles.where(hidden: false).or(@contest.puzzles.where(hidden: nil)).order(:id)
     @completion = Completion.new
+    @completion.contest = @contest
     @completion.code = @contest.code
 
     render "completions/_form", locals: { completion: @completion, submit_text: t("helpers.buttons.validate"), method: :post, url: "/public/p/#{params[:contestant_id]}" }
diff --git a/app/views/contests/_scoreboard_desktop_single.html.slim b/app/views/contests/_scoreboard_desktop_single.html.slim
index 11fe450..e01ec54 100644
--- a/app/views/contests/_scoreboard_desktop_single.html.slim
+++ b/app/views/contests/_scoreboard_desktop_single.html.slim
@@ -5,7 +5,7 @@
       function adaptHeight() {
         const tabsEl = document.getElementById('event-nav');
         const scoreboardContainerEl = document.getElementById('scoreboard-container');
-        scoreboardContainerEl.style.height = `calc(100vh - ${180 + tabsEl.offsetHeight}px)`;
+        scoreboardContainerEl.style.height = `calc(100vh - ${210 + tabsEl.offsetHeight}px)`;
       }
 
       adaptHeight();
diff --git a/app/views/contests/scoreboard.html.slim b/app/views/contests/scoreboard.html.slim
index 4da4c33..c0d74fe 100644
--- a/app/views/contests/scoreboard.html.slim
+++ b/app/views/contests/scoreboard.html.slim
@@ -1,6 +1,7 @@
 css:
   @media (max-width: 800px) {
     .mobile-single { display: block !important; }
+    #qrcode { display: none; }
     .desktop-single { display: none; }
     #scoreboard-switches { display: none; }
     .stopwatch { font-size: 50px !important; }
diff --git a/app/views/layouts/authenticated.html.slim b/app/views/layouts/authenticated.html.slim
index aedef06..f2d3dd7 100644
--- a/app/views/layouts/authenticated.html.slim
+++ b/app/views/layouts/authenticated.html.slim
@@ -49,7 +49,7 @@ html
             - if active_page("/public/event/") == "active"
               = @contest.event.name
               - if @qrcode
-                .float-end style="width: 80px; height: 80px;"
+                .float-end style="width: 80px; height: 80px;" id="qrcode"
                   = @qrcode.html_safe
               = render "event_nav"
             - else