So while playing Rev during the weekend, along with the hammer bugs that have already been posted, I noticed that the mace is suffering from similar issues as well. Notably, Mace 2, Searing Fissure.
When using the skill on an incline or on top of a hill, I found that the field was sometimes not applying the burning ticks until after one pulse had occurred, then properly applied the 3 remaining ticks. Other times, it did not apply the burning at all, even with the mob standing inside the field.
It’s quite possible that the same issues that the hammer is having are affecting the mace skills as well.