In Teams Bot OUTLINE icon(chat icon) is not getting displayed

Question

ChatIcon.pngThe OUTLINE icon displayed earlier is not showing now after updating the teams app. We tried following things:

(1) We cleared all the team's cache

(2) Go to your bot in azure >> go to settings on left hand side - you will see the first option to upload custom bot icon. This will update your icon.

But still the OUTLINE icon is not displayed. I have marked it in the attached image.

The configuration in .env file:

CONFIG__MANIFEST__ICONS__OUTLINE=resources/BotLogoSmall.png

The image BotLogoSmall.png is in the resource folder. This image has been displayed properly for more than a year. Now, suddenly, without any change in the bot source code or recent publishing of the bot in the Partner Center, the image is not getting displayed

The configuration in Manifest file :

"icons": {
        "color": "${{CONFIG__MANIFEST__ICONS__COLOR}}",
        "outline": "${{CONFIG__MANIFEST__ICONS__OUTLINE}}"
    },