Low resoulution textures(Low poly) for sims 4 xbox one

Well, Im doing this on a phone. But sometime when i have access to a laptop ill send it. On top of that, i downloaded the latest update from yesterday and it's either my save or the world and lot(Brindleton bay) but whenever I open up build mode, it lags unless I click bulldoze lot which I cancel the process and it stops lagging. But after that whenever I go to the buy mode catalog, it starts lagging. Again. 

I'm guessing it's from whenever like I download or update,in this case, my xbox says "can't load saves"(even though I can still load them) and thr only options it gives me are 'try again or play offline". Long story short the low-ploy glitch and buy mode lag is is what my game thinks it can pull off on me. As if my game was a living being with its own freewill. But it's probably the save causing all of this because it's the oldest save I have. And trying out the new update today, I made a new save and nothing was wrong. I get it requires more loading time for a save that has more data. But I'm not letting this happen to my save. In fact,  the save I'm using was not this glitchy at the start.