Help me Potty Regression

My boy Enzo is about to be 11 months old and seems to be having a regression in his potty training. We got him when he was 2 months old and did the crate training and had I’m in the crate and pen until he was about 6 months old and then opened up our apartment to him. He did well over. I would come home on my break and walk him for about 20 mins on my lunch break and he never had any accidents. We recently moved to a home and have a lot my space. We have had countless accidents for about 3 weeks with upset stomach and soft poops in the same spot. I believes they were due to his bully sticks and once we took that away no more number 2’s in the house for about 2 weeks. But all of a sudden this morning he pooped twice and it was healthy and even peed on the rug which he has never peed in the house. I don’t know where to start with re training him. My ideas are to walk him in the morning for about a half mile, he gets let out an hour later then my wife and then my mother in law takes him out at lunch time in t he back yard, and then my wife walks him about 2 miles in the evening. Should I crate him again and then slowly open sections of the house? Could I avoid that and just maintain my walks? I’m lost help!!!!