When holding the travel staff or a teleportation enchanted item, the travel anchors turn into invisible blocks. This happens both when you have a line of sight to the anchor and also when the anchor is behind walls. This effectively means that I cannot see the travel anchors from anywhere. Importantly, the travel anchors still work as expected as long as you know roughly where to look. Please look at attached images. I am playing All The Mods 8 and Travel Anchor mod version 1.19.2-4.1.2.



When not holding the travel staff:





When holding the travel staff:

I just discovered the cause of this. AllTheMods/ATM-8#1143