Only idle reverse is used at FCA. So the reverser cowlings will still be seen to be deployed but no increase in thrust. This is deamed because carbon brakes are cheaper than the enhance engine wear. Also with high amounts of reverse, particularly at the slower end of the speed regime there is always a danger of sucking up stones/debris etc. which will potentially cause fundamental damage to an engine.
Hope that answers your question?!
LOC
(SFO for FCA)