It's coded in, like when a chanter has a charmed pet and is like, "AFK, bathroom!" and gets wrecked immediately after.

Was trying to proc my hammer the other night on EC trash mobs and got bored of swinging without proccing for over a minute so I just /quit. Logged back in 48 hours later next to a grass snake. Attacked and procced before the hit landed.

Folks, this is a real phenomena.

The answer to proccing your OT hammer on demand is clearly logging out for days between play sessions. Try it and report back.