Morning Gang. I bought a new 2017 work master 60 ( also from Dooley). I experienced the same problem with dropping RPM and no throttle response until turning key off and turning back on. Initially they came out and replaced the battery- no dice. The second time they came out they ended up updating the software. This was back in early (mar/apr 2018). I致e got about 170 hours on it now and for the most part no trouble. It has shut down once or twice however, I think it痴 because of overloading. I was pulling a super steep hill with a 7 bushhog, hit a swale which bounced the bushhog into the dirt.
For what it痴 worth I just had to replace the neutral sensor switch on the (Low/Neutral/High) lever. It wouldn稚 start.
All in all the tractor is awesome.
Happy tractoring