fix

packages/forms/resources/js/components/textarea.js

@@ -10,5 +10,14 @@ export default function textareaFormComponent({ initialHeight }) {
                 this.$el.style.height = this.$el.scrollHeight + 'px'
             }
         },
+
+        input: {
+            ['@intersect.once']() { this.render() },
+            ['@input']() { this.render() },
+            ['@resize.window']() { this.render() },
+            ['@form-validation-error.window']() {
+                this.$nextTick(() => { this.render() })
+            },
+        }
     }
 }

packages/forms/resources/views/components/textarea.blade.php

@@ -42,10 +42,8 @@
                 @endif
                 ax-load-src="{{ \Filament\Support\Facades\FilamentAsset::getAlpineComponentSrc('textarea', 'filament/forms') }}"
                 x-data="textareaFormComponent({ initialHeight: @js($initialHeight) })"
-                x-ignore
-                x-intersect.once="render()"
-                x-on:input="render()"
-                x-on:resize.window="render()"
+                x-bind="input"
+                wire:ignore.style.height
                 {{ $getExtraAlpineAttributeBag() }}
             @endif
             {{