The discussion being entirely banned on Weibo also implies that it's deliberate.
Try searching "李嘉诚发声" and you'll get a message saying "According to relevant laws, regulations and policies, this page is not found"
> The discussion being entirely banned on Weibo
I have also noticed sharing videos WeChat seems to be on whitelist mode 2 nights ago.
Speculation is that there were heavy traffic for sharing globally resulting in all videos on WeChat were temporarily shadow banned until individually approved.
Unfortunately you don’t really get one without tending to get the other.
I've tried to dig for references, but it's very difficult to find discussions 2+ years back, let along official news.