My docs were received on 23rd May and after the status was changed to "Docs received - Review in progress" on 27th May. But on 28th it changed to "Waiting for required documents" again. On raising a question throgh contact us form, I got a generic reply on 30th that resubmit documents as per your country specific requirements. I asked them to recheck since my univ confirmed they had sent all documents in order. Then on 2nd June they changed status back to "Docs received - Review in progress" but again on 3rd changed it to "Waiting for required documents". On 4th I called them to ask about the exact problem and was told that the university envelope was received opened. I checked with Delivery courier as well as university and both confirmed that the envelope was delivered in proper sealed condition and they have the proof of WES signature for it. Then I wrote a strong mail to them on 5th June that it was definitely some confusion on their side and they should accept my docs, they changed the status back to "Docs received - Review in progress" and it is the same till this time i.e. 7 working days.
So just like Royston, it has been in this status since long but I think this is because of the number of applications they are working on now and not because of any other issue.They won't confirm much on phone while status is In progress but I believe it'll definitely change within next 2 days. My wife's assessment was also stuck in this status for 8-9 working days so I think our applications will get through in coming days.