Adrianmsmith
These were different issues - the leaking from the solenoid fill valve was indeed siphoning as suggested by Dave but only showed up because my machine was set to plumbed in settings. It didn’t materialize every fill because the unique conditions of siphoning and needing a fill had to happen simultaneously, which I guess took a few weeks to occur.
I am trying to find time to pull the panels off and trace my tubes better. Ultimately the excess water out of the steam wand isn’t terrible, but it is a bit annoying as I splatter a bunch of water out of it during my first purge. I basically have to tell the kids to stand on the other side of the room when I’m making them steamed milk (which is secretly a selfish act so I can practice milk steaming).