How to tell new employer that moving plans fell through

Hey everyone, I recently got a job in a city about 30 miles away and start on Monday. I told them that the reason why I left my previous job (which as around there) was due to my commute, and I was planning on moving next month to a place very close by but that fell through and now I’m afraid what to say if they ask about my move. I’m currently putting my search in overdrive to find a place but I’m afraid I may have to move to a city a little bit further away (but still much closer to my new job). I don’t want them to get suspicious or think I was lying or anything like that. Should I just be up front and tell them or wait until they ask? Am I just getting worried for nothing? Thanks

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