diff --git a/app/javascript/flavours/glitch/styles/mastodon/components.scss b/app/javascript/flavours/glitch/styles/mastodon/components.scss
index da20098f3a..e30f02f668 100644
--- a/app/javascript/flavours/glitch/styles/mastodon/components.scss
+++ b/app/javascript/flavours/glitch/styles/mastodon/components.scss
@@ -1424,6 +1424,9 @@ body > [data-popper-placement] {
   .autosuggest-textarea > .autosuggest-textarea__textarea:lang(#{$lang}) {
     writing-mode: vertical-lr;
     min-height: 209px; // writable
+    max-height: 209px; // suppress autosizing by react-textarea-autosize
+    overflow-x: auto;
+    scrollbar-color: unset;
   }
 
   .detailed-status > .status__content > .status__content__text:lang(#{$lang}) {