Method.watch() lost events

[kinggozhang]

code is:

localTronweb.contract().at(minercontract).then(
		function(contract){						
			contract.Created().watch((err, event) => {
			if (err){
				return console.error('Error with "method" event:', err);
			}
			if (event) { 
				console.log(event);
			}
			});					
		},function(error){});

I tested it in shasta network, found it will lost some events emited by contract.
is it normal?

[artyomLisovskij]

same here with production