diff --git a/ts/components/Popover.svelte b/ts/components/Popover.svelte
index fb32ff072..11e0f1b8d 100644
--- a/ts/components/Popover.svelte
+++ b/ts/components/Popover.svelte
@@ -86,7 +86,6 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         }
 
         &.hidden {
-            width: 0;
             visibility: hidden;
         }
 
diff --git a/ts/editor/mathjax-overlay/MathjaxEditor.svelte b/ts/editor/mathjax-overlay/MathjaxEditor.svelte
index 381b89987..31456ffa1 100644
--- a/ts/editor/mathjax-overlay/MathjaxEditor.svelte
+++ b/ts/editor/mathjax-overlay/MathjaxEditor.svelte
@@ -114,7 +114,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         overflow: hidden;
 
         :global(.CodeMirror) {
-            max-width: 28rem;
+            max-width: 100ch;
             min-width: 14rem;
             margin-bottom: 0.25rem;
         }
diff --git a/ts/editor/mathjax-overlay/MathjaxOverlay.svelte b/ts/editor/mathjax-overlay/MathjaxOverlay.svelte
index 4bc134be2..04c72af5d 100644
--- a/ts/editor/mathjax-overlay/MathjaxOverlay.svelte
+++ b/ts/editor/mathjax-overlay/MathjaxOverlay.svelte
@@ -210,6 +210,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
                 reference={activeImage}
                 offset={20}
                 keepOnKeyup
+                portalTarget={document.body}
                 let:position={positionFloating}
                 on:close={resetHandle}
             >