Locale other than en-US shows the upload button

Is it an issue related to Adaptive Cards?

• Yes, this is an Adaptive Card issue but it is specific to Web Chat.

Do you have any screenshots?

No response

What version of Web Chat are you using?

Latest production

Which distribution are you using Web Chat from?

Bundle (webchat.js)

Which hosting environment does this issue primarily affect?

Web apps

Which browsers and platforms do the issue happened?

Browser: Edge (latest), Browser: Chrome (latest)

Which area does this issue affect?

Send box

Is this an accessibility issue?

• Yes, this is an accessibility issue.

Please describe the bug

I'm using the webchat v4.
I render the chat with the help of window.WebChat.renderWebChat()
When I send the locale parameter as "en-US", the upload attachment button works normally.
but whenever I send the locale parameter as "zh-CN" or anything other than "en-US", the upload attachment button shows-up. and doesn't work.

I do have the application as the bot's default language might change, it can be english or chinese or anything.
I also checked the bot supported languages and the chinese(zh-CN:stt) is present but for some reason, the upload button fails to work or it shows up irrespective of hideUploadButton configuration.

Is there a default language for the bot, or can we change it somehow.

Thanks in advance.

Do you see any errors in console log?

No, I don't see any errors in the console.

How to reproduce the issue?

1. Navigate to ...
2. Click on ...
3. Type "..." in the send box

What is the expected and actual behavior?

Expected: hideUpload button is false, but I'm toggling the upload button manually which works for english language.

Actual: hideUpload button is false, but I'm toggling the upload button manually which doesn't work for any language other than english.

Adaptive Card JSON

No response

Additional context

No response