"Successfully published" pops up, but the blue Publish button is shown below too?

Optimizely CMS claims to have finished publishing and yet the Publish button is still visible and active. If we publish again then we do see the expected message of 'No changes since last publish'.
So far it appears to actually publish all changes to the frontend at the first push of the publish button, but the user experience can't be ment to be this way right?
Any suggestions for debugging or solving this?

It's CMS v12.22.1

Thanks in advance and best regards