Was the case for me in August and last October.
I did the turnaround in CMB was so stuffed for the CMB-SIN-HKG return that I had no problems in sleeping; would have been the case in WHY too I reckon.
In all honesty, I don't believe it's a real issue; you travel via BKK/SIN and the sectors are not long enough to have a decent sleep anyway.
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