Managed to catch a very rare interaction. This is what happens if you block a task then get it b2b with a slayer cape.
/r/2007scape: Old School RuneScape! - The community for Old School RuneScape discussion on Reddit. Join us for game discussions, weekly events, and skilling competitions! OSRS is the official legacy version of RuneScape, the largest free-to-play MMORPG. - October 7, 2022 - 15:41