Ah, I did not know that, thank you.
I saw it updating like that but I didn’t think it would have any effect on the door opening, so I just changed it on the timeline so when Finished, send message, it sends the message once now but it still doesn’t trigger the Event SwitchFlipped in the SwitchDoorBP. Its a step forward for me though! So now I just need to figure out why that event isn’t triggering even though the switchbp is reading the interface message