Don’t think it’s a bug with the engine. Looking at the graph:
bot_hand_R06 is attached directly to the RootNode which is weird.
I attached the hit1 entity to Bip01 R Hand (full path Root/player1/RootNode/Root_Bone/Bip01/Bip01 Pelvis/Bip01 Spine/Bip01 Neck/Bip01 R Clavicle/Bip01 R UpperArm/Bip01 R Forearm/Bip01 R Hand)
And it animates fine:
