[Bug] Teams Adaptive Card Show as Blank on Android Mobile Client [Critical]

[johnmiroki]

Steps to reproduce

Install the latest Teams
Install Developer Portal from Teams app store
Send the simplest card:

{
"type": "AdaptiveCard",
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
"version": "1.5",
"body": [
{
"type": "TextBlock",
"text": "New TextBlock",
"wrap": true
}
]
}

Expected behavior

An adaptive card with some text shows in the chat with Developer Portal

Actual behavior

A blank message is received (ignore the fact that screenshot is not taken from Developer Portal but the idea is the same)

Error details

No response

[microsoft-github-policy-service]

Hi johnmiroki! Thank you for bringing this issue to our attention. We will investigate and if we require further information we will reach out in one business day. Please use this link to escalate if you don't get replies.

Best regards, Teams Platform

[johnmiroki]

Teams client info

[Prasad-MSFT]

Thanks for raising your issue. We will check this at our end and will update you accordingly.

[Prasad-MSFT]

Hi @johnmiroki - We tried to repro this issue using the card JSON provided sending via Teams developer portal and observed that the card renders properly in both MS Teams Desktop/Web client and Android client.

Android:

MS Teams Version:

[johnmiroki]

@Prasad-MSFT Thanks for checking. Just to confirm, the test includes Team app on an Android phone, right?
In the meanwhile, we'll wider our test scope and update here.
Thanks!

[Prasad-MSFT]

Yes @johnmiroki, we tested with Microsoft Teams app installed in Android device.

[johnmiroki]

We tested on Teams downloaded from Chinese app store and we can reproduce the problem (limited tests on limited devices).
Is Teams client repackaged for China market by some Microsoft partner?

[johnmiroki]

Now we think the issue only exists in the so called "21Vianet" version, any chance we can get a hold of their team?

[Prasad-MSFT]

We have raised a bug for the same. We will inform you once we get any further update from engineering team.

Thanks!