Vray 3.60.04 latest nightly Progressive and Full Light Eval/Probablistic terminates very early.

As the title, Progressive using Full Light Evaluation/Probabilistic terminates very early and thus very noisy. Tried resetting and scene converter, neither helped. Adaptive seems ok, at least it renders for much longer. Bucket seems ok too. I`m just switching Adaptive to Full and back. I think it`s been like for a few nightlies now ?
thanks
anthonyh
edit: ok, tracked it down to clamping, if switched on it ends really early, if off it renders ok. Explains why Adaptive was ok as it auto turns them off.