Following the new update, we are noticing messages not sending more often. We’ve also sent messages with photos and the attached photos are blank files. This is a message we’d previously only seen due to connection errors, but now messages have about a 50/50 chance of sending/not being delivered.
Do you have more details on what update you’re referring to?
What Mattermost server version are you on? Do you see any errors in Mattermost logs?