I have Red Clover Tea FO from MMS, and it has accelerated on me, but the acceleration isn't instant. I'd soap on the cooler side of your normal temp range and don't plan on a super complicated design.
According to my notes, I used it at 6% in a batch of high lard soap and it "...behaved okay for a couple of minutes, then accelerated quickly to a cold gravy texture with chunks while heating up a lot."
For another batch with a similar blend of fats, I "...did a drop-pour with hanger swirl. Was getting to med-heavy trace at the end..." This also had the FO at 6%. When I've done this same recipe with a non-accelerating FO, it is usually only at light trace by the time I'm done.