I’m not sure if this is the right place to report a bug. Please advise if this is inappropriate here.
Pretty simple to reproduce. Create a new Alarm Notification Pipeline and zoom either in or out by doing something like ctrl+scroll wheel and try to draw a connection between the start and a new block. It will always select the entire start block to move rather than allowing you to draw a connection between it and another block.
I’ve seen this behavior in 7.9.5 and 7.9.10, I have not tried it in 8.0