Unsupported message - View on Instagram?
Unfortunately, the Instagram API (the system that lets different software communicate with Instagram) is not providing the necessary information to display messages. If you see a message saying "Unsupported message - View on Instagram", it's not a failure from Missive, but it's the actual message Instagram is sending.
There is currently no solution to this problem. It's up to Instagram to update their API functionalities. This is a known issue that has been reported to Meta by other developers for a long time.
While we wait for a resolution, you can show your support and stay updated by upvoting this feature request. This will keep you in the loop for any potential changes we might be able to make in the future.