I have multiple topics that are multiple choice questions, where the bot responds with the adaptive card. When the bot is used in a channel it no longer puts the "@bot" to before the chosen topic.
Here is what one of my questions look like in the studio:

And here is how it appears in a Teams Channel:

The bot works fine when used in the private chat, and this bot is only used in teams. I built the bot with PVA and it was working for fine.