I have a simple flow to turn on an LED on GPIO 36 (pin 36)OUTPUT it comes from a timer and also a CloudMQTT input, I also have an GPIO input from the same GPIO 36 back out to CloudMQTT as a monitor, the feeds are different names, the feed in is 'lamp' and the output is 'lampfeed'.
What I've found is the GPIO 36 monitor goes mad going on and off rapidly, I disconnected the CloudMQTT link and the GPIO on it's own still goes crazy even after a reboot. It used to work but I think a recent update it shows this weird behaviour - I don't remember if I updated the GPIO node.
I did try pull the pin high and low via the output down but that kills it either way. Debounce does slow it down though.