The EnderIO version of this let you see all anchors in-range through walls so you can actually use it to teleport to anchors from any difference without needing line-of-sight. I'm not sure if this is intentional or not, but it kind of makes the main purpose of the mod unusable.

Modpack is Enigmatica6, most recent stable version of Forge.

Can confirm, sometimes anchor names are not visible.

This was a modpack issue in Enigmatica6, it's been resolved.