False positive in grammar multiple assignments validation

[cdietrich]

Langium version: 3.3

given the grammar

entry Model:
    expr=Expression;

Expression: Equality;

Equality infers Expression:
    Literal (({infer Equals.left=current} '==' | {infer NotEquals.left=current} '!=')  right=Literal)*;

Literal: value=INT;

the validator complains about

src/language/hello-world.langium:9:88 - Found multiple assignments to 'right' with the '=' assignment operator. Consider using '+=' instead to prevent data loss.

imho this is a false positive with the ast rewrite. maybe it is not properly detected if happing on all branches of an alternative.

[cdietrich]

cc @JohannesMeierSE