Xtend Active annotation that remove Declaration raise BatchLinkableResourceStorageWritable messages

I have a project where I move some declaration (FieldDeclaration and MethodDeclaration) from one class to another using xtend active annotations

This was working fine with xtend 2.25 but since I moved to xtend 2.27 I get a lot of errors in the Error log such as:

org.eclipse.xtext.xbase.resource.BatchLinkableResourceStorageWritable  - Object (JvmParameterizedTypeReference:  (type uri: platform:/resource/test_remove_with_annotation/src/test_remove_with_annotation/TestClass.xtend#|3)) is not contained in any resource

I've extracted a subset of the active annotation that illustrate the issue (on Field only but the same occurs when deleting Method)
Annotation code:

@Retention(RetentionPolicy::RUNTIME)
@Active(typeof(MyAnnotationProcessor)) 
@Target(ElementType.TYPE)
annotation  MyAnnotation {
	
}

class MyAnnotationProcessor extends AbstractClassProcessor {

	/**
	 * Phase 2: Transform class' fields and methods
	 */
	override doTransform(List<? extends MutableClassDeclaration> classes, extension TransformationContext context) {
	    val	List<MutableFieldDeclaration> toRemove = newArrayList
		for (clazz : classes) {
			// remove fields starting with "_"
			for (f : clazz.declaredFields) {
				if(f.simpleName.startsWith("_")) {
					toRemove.add(f)
				}
			}
		}
		toRemove.forEach[ f | f.remove]
	}
}

The code generated in xend-gen is Ok (cf. screenshot

Annotation project (run in the first Eclipse):
annotation_projet.zip

Annotated project (run in the runtime workbench):
annotated_projet.zip

Reproduce the issue with the attached annotation and annotated projects using Xtend 2.27, starting from MyAnnotationProcessor.doTransform and the generated xend-gen output. Compare field removal with the reported BatchLinkableResourceStorageWritable messages; done when the declarations are removed without those errors and the generated code remains correct.