Hi All,
One of our teams has implemented an incoming webhook from Splunk into MS Teams to post an message when an alert is triggered.
We encountered what seems to be a bug where for one specific message it was unable to be replied to or reacted to. Strangely enough viewing the message on a mobile would allow you to reply and react to it.
Every other alert message before and after we have been able to be reply to.
Strange... though this looks like an issue with your Teams client, given that you can reply to the message with a different mobile client.