Because it was restocked I would first look for a problem with the triggers engaging the sears. I have had Brad do quite a bit of work for me and believe he's one of the best gunsmiths there is. If you're interested he can be reached at 616-459-3636.
I'll second that-- I left the GHE with him in June 2010- the cocking slide had worn and was not engaging when you broke open the gun to recock the hammers-- I had it back in my hands 3 weeks later, and it hasn't missed a beat since--Brad Bachelder is a Master Craftsman in the truest sense of the word!!!
