Live mode lag

Hey guys, I play the sims on the Xbox one S. I have a legacy save and I’ve just moved gen 7 into her own home. I have downloaded a house from the gallery and I’m going to furnish it myself, cause I’m not a great builder, But so far all I have done is the kitchen, bedroom and a tiny bathroom so the house is not densely furnished yet. Right now it’s close to being empty. The house is pretty big but like I said it isn’t very furnished yet. 
Anyway I was building from manage worlds and when I moved my sim in and went into live mode, every time I sped up my game I experienced the most unbelievable lag ever. Normal speed is fine and manage worlds build mode was fine. I went into some other houses and they were fine when the time was sped up and they were both completely furnished and large. I wondered if anyone knew if it was my specific house or lot? Or if there is a potential other reason?
For context I have placed my house on the 30x30 in Windenburg where the gym is originally. thank you to anyone that has any advice or suggestions!!