diff --git a/.changeset/loud-boats-judge.md b/.changeset/loud-boats-judge.md
new file mode 100644
index 00000000..9e918184
--- /dev/null
+++ b/.changeset/loud-boats-judge.md
@@ -0,0 +1,5 @@
+---
+'react-textarea-autosize': patch
+---
+
+Workaround for Firefox `scrollHeight` bug affecting textarea's height on a dynamic toggle
diff --git a/src/calculateNodeHeight.ts b/src/calculateNodeHeight.ts
index 3f7067eb..834e43d6 100644
--- a/src/calculateNodeHeight.ts
+++ b/src/calculateNodeHeight.ts
@@ -49,6 +49,9 @@ export default function calculateNodeHeight(
 
   hiddenTextarea.value = value;
   let height = getHeight(hiddenTextarea, sizingData);
+  // Double set and calc due to Firefox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1795904
+  hiddenTextarea.value = value;
+  height = getHeight(hiddenTextarea, sizingData);
 
   // measure height of a textarea with a single row
   hiddenTextarea.value = 'x';