False positive "Flexible Constructor Bodies is only available with source level 25" on @AllArgsConstructor with Java 21 #4543

Environment:

VS Code version: 1.x

Extension version: 1.57.0

Java version: OpenJDK 21

Project type: Spring Boot 3.5.3 (Maven)

Description:
When using Lombok's @AllArgsConstructor annotation on an entity/DTO class in a Java 21 project, the extension incorrectly flags a syntax error:
The Java feature 'Flexible Constructor Bodies' is only available with source level 25 and above Java(4195411)

Steps to reproduce:

Open a Spring Boot / Maven project with Java 21 compliance level (java.project.compiler.compliance: "21").

Create a class annotated with Lombok @AllArgsConstructor.

The editor shows a Java 25 syntax error on the class/constructor.

Workaround:
Downgrading the extension to 1.53.0 resolves the issue immediately.