I found these supply online with different branding. So I decided to see if Big Clive had a review. He had two videos. One was about a unit his friend had the caught fire - see photo. As he is wont to do, he ordered one for review. He shows some interesting problems with the UK style plug and power cable. But you may be interested in what he had to say in general and his surmise on the cause of the fire.
He did not mention the power up problem but I watched video by another user demonstrating operation of the supply, in particular the constant current feature. I am used to a constant voltage supply with a variable current limit. You set the voltage, then short the supply to set the maximum current. If the current exceeds the limit the supply folds back the voltage to reduce the current.
However, apparently these supplies in constant current mode will INCREASE the voltage to try to achieve that current setting. There are some cases where this would be useful but usually you want a voltage supply where you can limit the max current if something goes awry.
It strikes me this feature is muddled during power up and may be the cause of the switch on glitch.