Spells: Disease Cloud still not pulling aggro (sometimes)

[Ropethunder]

On my necromancer, pulling aggro with disease cloud is still hit or miss since the last patch. For example:

Pulled and let pet tank maybe 30-40% ish. Cast Bond for hp, disease cloud, disease cloud, disease cloud. Can't pull it off.

Rooted the mob. Disease cloud, disease cloud, disease cloud, disease cloud. Root wore off and the mob ran for my pet.

Sometimes I don't have this issue and disease cloud pulls it right off. Before the initial changes were made, disease cloud would always pull aggro from my pet within one or at most two casts.