I didn't read the post (don't Medium and most of the time it's useless stuff) but I'm not surprised. Gke / kubernetes has a ton of dark stuff going on. In, there are dozens of parameters and if you don't set them. They are default which can... Lead to strange situations :)
Inspect all the stuff and generated configs! That's how I started.
Inspect all the stuff and generated configs! That's how I started.