Hi.  Yes I have them all running in separate apps and have never had a problem for 1 year.  But something changed a few days ago and now if you maximise another window in front of them they will stop running and as soon as you minimise the window in front of them they will start running again.  Other people are reporting it as well so I am pretty sure that something has changed.  If you use chrome can you please run a test.  Start a reactor running,  look at the counter then open any other window in front of it for a minute then minimise and look at the counter and see if it has stopped running for that period.  I also run multiple “desktops” on my screen.  When i “slide” off the desktop that is running the reactors and then come back to it  the reactors have “paused” for this time…..