Fix

packages/effect-fc/src/SynchronizedForm.ts

@@ -146,15 +146,22 @@ const makeEncodedValueLens = <A, I, R, TER, TEW, TRR, TRW>(
 ): Lens.Lens<I, never, never, never, never> => Lens.make({
     get get() { return self.internalEncodedValue.get },
     get changes() { return self.internalEncodedValue.changes },
-    modify: f => self.internalEncodedValue.get.pipe(
-        Effect.flatMap(f),
-        Effect.flatMap(([b, nextEncodedValue]) => Effect.as(
-            Effect.andThen(
-                Lens.set(self.internalEncodedValue, nextEncodedValue),
-                self.synchronizeEncodedValue(nextEncodedValue),
-            ),
-            b,
-        )),
+    modify: f => self.internalEncodedValue.modify(
+        encodedValue => Effect.map(
+            f(encodedValue),
+            ([b, nextEncodedValue]) => [
+                [b, nextEncodedValue] as const,
+                nextEncodedValue,
+            ] as const
+        )
+    ).pipe(
+        Effect.tap(([, nextEncodedValue]) =>
+            self.synchronizeEncodedValue(nextEncodedValue).pipe(
+                Effect.forkScoped,
+                Effect.provide(self.context),
+            )
+        ),
+        Effect.map(([b]) => b),
     ),
 })