No. KCC is not delaying anything on purpose, they have a high shortage of employees, and I have an official source for this it's Here.There is a such a concept of management
Solving a problem more difficult than preventing it. In my opinion, KCC is purposefully delaying the process in order to prevent problems that may arise for embassies and KCC in the current situation by delaying the process.
Personally i do not believe any backlog story , and it is more easy for KCC to explain stopped or delayed process in the future with unknown reason than exact reason.
I'm going to write a long summary of this paper later, but it has a lot of good info we didn't know about and a lot of info we know now is wrong.