OH 3.1 stable - There are still SSE events the queue which may not be delivered (closing now)

Setup, Configuration and Use Beginners
1

Hello,

Saw this was an error in some snapshots, but i’m using the latest stable release 3.1.0 on Ubuntu with error:

There are still SSE events the queue which may not be delivered (closing now)

Does anyone know what this means and how to remove it?

Thanks