Aibolit cyclomatic fail to count for large lambda

[lyriccoder]

1.txt

Override
    @SuppressWarnings("aibolit.P31")
    public CompletableFuture<Void> save(final Key key, final Content content) {
        return CompletableFuture.supplyAsync(
            () -> {
                final Path tmp = Paths.get(
                    this.dir.toString(),
                    String.format("%s.%s.tmp", key.string(), UUID.randomUUID())
                );
                tmp.getParent().toFile().mkdirs();
                return tmp;
            },
            this.exec
        ).thenCompose(
            tmp -> new File(tmp).write(
                new OneTimePublisher<>(content),
                this.exec,
                StandardOpenOption.WRITE,
                StandardOpenOption.CREATE,
                StandardOpenOption.TRUNCATE_EXISTING
            ).thenCompose(
                nothing -> this.move(tmp, this.path(key))
            ).handleAsync(
                (nothing, throwable) -> {
                    tmp.toFile().delete();
                    final CompletableFuture<Void> result = new CompletableFuture<>();
                    if (throwable == null) {
                        result.complete(null);
                    } else {
                        result.completeExceptionally(throwable);
                    }
                    return result;
                },
                this.exec
            ).thenCompose(Function.identity())
        );
    }

Aibolit shows 0 Cogc for this method.
It also ignores all if/else statements inside lambda.