Slack, one of the preeminent chat apps utilized by businesses, experienced an outage on Tuesday morning. The company confirmed the issues at 8:10 a.m. EDT, right when many still stuck East Coast working from home would have been starting their day.

The issues persisted a few more hours, with users complaining about their inability to send and receive messages and the generally slow performance of the service. By 9:48 a.m. EDT, the company reported that most of the issues should have been resolved and that it was continuing to plug away at the rest.

“The performance issues we’ve been seeing should be mostly resolved, and there should no longer be any issues with messaging,” the official Slack status page explained. “However, users may still see some errors as we work to fully fix the issue. We’ll let you know when we’re confident this is fully resolved.”

According to Down Detector, Slack’s issues skyrocketed a little before 9 a.m. and peaked about 15 minutes later. By 10:15 a.m., the number of reports had dropped back down to relatively normal levels. “Sending messages” and “Connecting” were the most commonly cited issues, with reports centered mostly on the East Coast of the U.S., western Europe, and Japan.

The workplace messaging app Slack filed an EU antitrust complaint accusing Microsoft of abusing its market dominance by integrating a competing service in the widely used Office software suite The workplace messaging app Slack. Photo: GETTY IMAGES NORTH AMERICA / Drew Angerer