event markers
Maybe they are for the new Rifts.
Yeah, I have just encountered those. I even said that Content Guide was fooling me because it would point me to an event and then nothing was happening there. Glad to see I’m not the only affected (glad because it’s not at my end, but not glad with the bug :P)
After testing, I can confirm that using a Stabilizer in those locations will open a Rift.