It happens starting from around 8 Apr, the data returned from YQL are old and different on each refresh. Here is my YQL statement request.
The statement is simply preventing CORS issues when fetching data from other sites
https://query.yahooapis.com/v1/public/yql?q=select * from html where url="http://etav3.kmb.hk/?action=geteta&lang=tc&route=74K&bound=1&stop=HO04T10000&stop_seq=22&serviceType=2"&format=json
I realized it is YQL's problem because fetching the original URL have no any issues.
http://etav3.kmb.hk/?action=geteta&lang=tc&route=74K&bound=1&stop=HO04T10000&stop_seq=22&serviceType=2
Some users have reported similar issue and reported the problem fixed: Yahoo weather API, randomly returns old data?
But I am still facing the problem right now. What could I do to fix it? Thanks for help.
