Issue with IAP (Telegram Stars) on Android

I have a game in development for Telegram, using Unity3D, and I want to integrate IAP (Telegram Stars) into the game,

The flow is as following:

• user click on in-game item
• the game call Telegram API createInvoiceLink to get the invoice link
• the game call Javascript window.Telegram.WebApp.openInvoice with above link
• a Telegram prompt will appear for user to confirm (<- issue with Android here)
• wait for a callback
• in game, display popup based on the status

The above flow worked on Telegram Desktop, but on Telegram Android, there is no prompt, instead "Share" menu is opened.

Have anyone encountered this issue? do you have a solution?

Here is my javascript code:

OpenTelegramInvoice : function(params) {
    if (!window.Telegram || !window.Telegram.WebApp) {
        window.GameInstance.SendMessage('APIOperator', 'OnTelegramInvoiceFailed', 'Cannot find Telegram');
        return;
    }
    var link = UTF8ToString(params);
    window.Telegram.WebApp.openInvoice(link, (status) => {
        if (status == "paid") {
            window.GameInstance.SendMessage('APIOperator', 'OnTelegramInvoiceSuccess');
        } else {
            window.GameInstance.SendMessage('APIOperator', 'OnTelegramInvoiceFailed', status);
        }
    });
}

this is a screenshot from my smartphone

I got it solved somehow,
I think the issue is from Telegram's side, it's how the "game" (created with /newgame) behaves,
Instead of using "game", I publish my game as "mini-app" (created with /newapp) then the issue went away (I can process IAP with both PC and Android Telegram)