One behavior that I desperately wish had been called out: individuals who, seeing a back-and-forth over Slack, fail to realize that the communication is effective, and post a single message containing a Zoom link. In spite of this sounding like a pointy-haired boss type behavior, I've seen all sorts of engineers do it.

The intent is obvious: stop everything else that you are doing and join, so that it's the only thing that you are doing.