typescript definitions incorrect when using --es6

[Lopdo]

protobuf.js version: 6.7.3

disclaimer: I am pretty new to typescript modules and using npm, so I might be missing something basic

I am trying to generate static module form my .proto file, but generated definitions file doesn't contain any properties or method on my messages

I have very simple proto file:

syntax = "proto3";

message TestMessage {
	int64 userId = 1;
	string userName = 2;
}

which I am trying to turn into static module using

pbjs -t static-module -w es6 -o pbmessages.js ./messages.proto
pbts -o pbmessages.d.ts pbmessages.js

This results in:

type TestMessage$Properties = {
    userId?: (number|Long);
    userName?: string;
};

export class TestMessage {
    constructor(properties?: TestMessage$Properties);
}

When I remove the --es6 param, I get results that looks correctly:

type TestMessage$Properties = {
    userId?: (number|Long);
    userName?: string;
};

export class TestMessage {

    constructor(properties?: TestMessage$Properties);

    public userId: (number|Long);

    public userName: string;

    public static create(properties?: TestMessage$Properties): TestMessage;
    public static encode(message: TestMessage$Properties, writer?: $protobuf.Writer): $protobuf.Writer;
    public static encodeDelimited(message: TestMessage$Properties, writer?: $protobuf.Writer): $protobuf.Writer;
    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): TestMessage;
    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): TestMessage;
    public static verify(message: { [k: string]: any }): string;
    public static fromObject(object: { [k: string]: any }): TestMessage;
    public static from(object: { [k: string]: any }): TestMessage;
    public static toObject(message: TestMessage, options?: $protobuf.ConversionOptions): { [k: string]: any };
    public toObject(options?: $protobuf.ConversionOptions): { [k: string]: any };
    public toJSON(): { [k: string]: any };
}

[Lopdo]

closed because it is duplicate of #820