Are you guys not double-checking it? Or even try to re restore it; let's say the wallet is already set up. Before funding it, try to remove that wallet first and restore using the words you just wrote.
Last time I set up my wallet, I did and so far so good.
This is for sure commno problem, there are some Bitcoin wallets after backing it up, they will ask you again to enter so they are sure what you wrote are all correct.
Until I encountered a mistake that led to me almost losing access to my bitcoin wallet, I didn't usually do that. The luck I had was the first phone I used to create that wallet was dumped at home and not wiped yet. While in a different town from where I am based, I tried to access the wallet from where the phrase was written down. I noticed it was a totally different wallet. After struggling a few times and almost giving up, I was struck with the idea that I might have misplaced a word or two, which I later confirmed after I went back to grab the phone, which I used the backup option to correct.