Received another email today. Unfortunately not the decision email yet.
“Regarding Visa Application: XXXX
For: XXXX
The UK Decision Making Centre is currently assessing the application submitted by the above named. We are unable to conclude the application at this time as we require additional information.
Please provide the following documents:
Due to a scanning error can you please provide your sponsors payslips for earnings received January 2019.
Please send this document as as a scanned attachment within 10 working days to xxx quoting your application reference in the subject line. Please attach the document directly to the email as we are unable to access links to files hosted on sites such as Dropbox or google drive.
King regards,
UK Decision Making Centre “
The payslip was definitely in there, as I got two chances to check the contents due to the a shipping error and having to resend.

So I guess there was some technical difficulty between NY and Sheffield. I am so glad I scanned in and saved copies of everything to my computer because I was able to email them them the scans within an hour.
I could only find one recent example of this email on here so I’m really hoping this won’t offset my application, and I will be receive a decision made email soon. At least I know they’ve began their assessment!