Passive tree selection bug PoE 2

I've been seeing a lot of posts online about certain passives being greyed out in the tree and saying "unallocated" despite having appropriate points after level ups and adjacent nodes already filled.

I've experienced this myself recently and thought I just maybe was misunderstanding the mechanics of it, but no. The problem wouldn't be this far spread otherwise and people are having to respec in order to actually get their tree working again. During my last level up I could only select one passive despite having like 5 others I could link directly to.

Relog seems to help for some, but most are saying you must respec with the hooded one...which is expensive. Some can't level up at essentially until they do this because all available passives cannot be selected.