I don’t think that’s a bug. The job has already been dumped to the machine. The GFUI is free to move onto the next job setup. You won’t get an updated bed image until the first job completes though.
I believe if you click the countdown timer in the upper-right it allows you to cancel in the job-in-progress. Not 100% on that though since usually when I need to cancel a job it’s because I’m looking at the running job at the machine and notice something, so I just open the lid.
A modal dialog referring to the next job, over the current dimmed out job-in-progress timer and cancel button… If that isn’t a bug, it is sure a clumsy feature.
That’s a completely separate window. Kind of like you can have a Printing Status window open chugging away on a 200-page Word document, and also start writing your next document in Word.