Wrong reported errors by compiler

I have some pieces of code that compiles fine in IntelliJ and Gradle but VSCode reports them as errors.
Examples:

1. Error in import

   import sun.security.ssl.ProtocolVersion;

I have to point that I'm not using the JVM in the error description. Here's my workspace's settings:

{
   "java.home": "/Users/augusto.dias/.sdkman/candidates/java/8.0.181-oracle",
   "java.jdt.ls.vmargs": "-javaagent:/Users/augusto.dias/my-project/.vscode/lombok.jar -Xbootclasspath/a:/Users/augusto.dias/my-project/.vscode/lombok.jar"
}

2. Wrong exception handling

I have a RetryTemplate class from spring and I'm calling execute as the following example:

retryTemplate.execute(getCallback(),getRecovery());

private RetryCallback<Void, IOException> getCallback() {
    return context -> {
        if (context.getLastThrowable() instanceof IOException) {
                    IOException e = (IOException) context.getLastThrowable();
    // do some other things
                    throw e;
        }
        return null;
    };
}

private RecoveryCallback getRecovery() {
    return context -> {
        Throwable lastThrowable = context.getLastThrowable();
    // do some other things
        throw lastThrowable instanceof Exception ? (Exception) lastThrowable : new Exception(lastThrowable);
    }
}

3. And finally: false error in method signature

    assertThat((List) ((Envelope) responseEntity.getBody()).getData(), hasItems(siteDTO));
    assertThat((List) ((Envelope) responseEntity.getBody()).getData(), hasSize(1));

Environment

• Operating System: macOS Mojave
• JDK version: 1.8
• Visual Studio Code version: 1.29.1
• Java extension version: 0.34.0

Start by reproducing the three reported diagnostics in the provided Java snippets using the workspace settings, JDK 1.8, VS Code 1.29.1, and Java extension 0.34.0. Compare the language-server results with IntelliJ and Gradle, then isolate whether each false error has the same cause. Done means the affected examples no longer produce incorrect diagnostics, with regression coverage for the reported cases.