Yep i was on hold for 30 mins and a chineese answered . System down . A note popped up on the tws saying they're working on it. Its one of the 2-3 times i ever recall it down in 25 plus years .That said i'm pretty heavy short and might want to trade out of some and reshort bounces .
As long as system is not down during market hours, I think it's tolerable. So far, I've only experienced once when the system was done during market hours. That was during the heights of Covid virus
I was having trouble too past few days on the mobile app and then yesterday it forced me to do an upgrade on the app so maybe worth checking that.