March 17, 2021 Besides insomnia, another sleep disorder observed during the pandemic is delayed sleep phase syndrome. The Straits Times SINGAPORE - Falling asleep quickly had never been an issue for Mr Lim, a digital marketer, but for more than three months last year, the 32-year-old took at least two hours to doze off on some nights. His sleeplessness began in August, when he learnt about a looming retrenchment exercise in his company. He went to bed at 11pm but took hours to fall asleep, before waking up at 4am and finding it difficult to fall asleep again. As a result, he felt lethargic and irritable and found it hard to concentrate at work during the day.