There is a bug with the mod Target Dummy where this mod treats it like an entity with vision and it doesn't allow you to do damage to the target dummy unless you hit it with a projectile or fire damage first. This fixes the issue for 5 seconds and the target dummy shows damage and DPS on the screen as normal, then it goes away again. I'm assuming this is because the target dummy lost sight or aggro on the player after that time. It would be nice if this mod just ignored that target dummy entirely and didn't treat it like an entity.

More specifically it's the Footwork API that is causing the issue. Even without Cloak and Dagger installed it breaks the target dummy. I think there needs to be an entity blacklist under the mobs config that allows mobs to be ignored from the system entirely.