diff --git a/browser-extension/src/lib/registries.ts b/browser-extension/src/lib/registries.ts
index d6cf1aa..cce6ce9 100644
--- a/browser-extension/src/lib/registries.ts
+++ b/browser-extension/src/lib/registries.ts
@@ -69,6 +69,7 @@ export class EnhancerRegistry {
             this.preparedEnhancers.add(enhancer)
           }
           const overtype = enhancer.enhance(textarea, spot)
+          this.handleDelayedValueInjection(overtype)
           return { enhancer, overtype, spot, textarea }
         }
       } catch (error) {
@@ -78,6 +79,24 @@ export class EnhancerRegistry {
     return null
   }
 
+  private handleDelayedValueInjection(overtype: OverTypeInstance): void {
+    // GitHub sometimes injects textarea content after a delay
+    // We need to trigger OverType to update its preview after such injections
+    // https://github.com/diffplug/gitcasso/issues/46
+    setTimeout(() => {
+      overtype.updatePreview()
+    }, 100)
+    setTimeout(() => {
+      overtype.updatePreview()
+    }, 200)
+    setTimeout(() => {
+      overtype.updatePreview()
+    }, 400)
+    setTimeout(() => {
+      overtype.updatePreview()
+    }, 8000)
+  }
+
   getEnhancerCount(): number {
     return this.enhancers.size
   }
diff --git a/browser-extension/tests/har-fixture.ts b/browser-extension/tests/har-fixture.ts
index 60e7e90..befcdf9 100644
--- a/browser-extension/tests/har-fixture.ts
+++ b/browser-extension/tests/har-fixture.ts
@@ -18,6 +18,7 @@ vi.mock('overtype', () => {
       preview: document.createElement('div'),
       setValue: vi.fn(),
       textarea: document.createElement('textarea'),
+      updatePreview: vi.fn(),
       wrapper: document.createElement('div'),
     },
   ])