Black Mail In Whitechapel: Find the mail box and the letter

So I did found the mail and also read it but suddenly the game crashed and when I run it again I didn't have the mail, I went again in the place where I found it and it wasn't there. Has it happened to anyone else? Just don't tell me I will have to start the game again from the beginning.

mostly likely. these people aren't keeping up with bug fixes whatsoever and it's so irritating considering I've had it for so long. I went on a 5 month long break and came back thinking it would be fixed and it's the same. I got caught on a bug in the red rivers mission. I started a new save but kept my other in hope of a fix. I'm playing on ps4.