Tier 1 Exceptional Talent processing times

Hi all!

July 19th - My application for endorsement had been received by the Arts Council.

August 16th – I have been granted the endorsement. I have applied for Tier 1 Exceptional Talent visa the same day.

August 18th - I gave my biometric data in Moscow TLScontact visa centre.

August 21st - I got an email saying that my application has been received by UK Visas & Immigration

August 30th - I got an email saying that my application has been received at the UK Decision making centre in Sheffield. The email address is VISAINFO.SHEFO@fco.gov.uk.

September 5th - I have made a request to escalate my case.

No news since then..

I heard from my lawyer and also from the UKVI call centre that it normally takes about 3 weeks, so I just wondering if anyone has an idea why it might take so long?