Climbing Picks won't grapple

I'm having a problem where I start to use the climbing picks, and at the beginning it is fine, but after a bit the picks will refuse to register the right click. They won't grabble, they won't climb, and the grabble icon will not light up. I have left the realm and returned multiple times, have restarted the game, and this keeps happening. However, my host can use them just fine. This means I am unable to engage in the majority of Gloriana's Tears, and I noticed this same bug in other realms as well, though was able to work around it there.