If you don't mind me asking, when did you submit your application for 820?Exactly Same Here!!! CO from Bangkok Embassy contact us for PC in the early Apr 2018 and we lodged all docs within 5 days but no response since then. We even have to pay for a BVB for my business trip recently which is very disappointing.
Our case is significantly straight forward and should be decision ready when I providing the PC. I totally do not see the point why it takes so long after the PC has been provided.