Hogged--- I've been flying in and around VVTS airspace for 25 years now and can honestly say the number of times I had trouble getting through would be able to be counted on one hand.
In the last 5 years I've connected to CPDLC on every flight ok and spoken to VVTS CTL without problem day or night.
I don't know what you are on about?
Now of you'd like to talk about Yangon......there IS a problem there..