Rasa Bot not tagging group in Slack appropriately

Hi, I have a bot that has been built in Rasa 1.10.9 . It sends messages to Slack using Slack’s RTM API. Until a couple of weeks ago, the bot was successfully able to @tag a group in the slack channel. Now, the tag doesn’t work properly instead of actually tagging the group it is just text that says @tag. The way tag is written in the Rasa bot is “<@tag>”. I am wondering is this possibly an issue with Slack updating something or is there a different way to let slack know that we are wanting to tag someone?