push log to grafana cloud having logs lost

[slow-groovin]

make a test like

for (let i = 0; i < 100; i++) {
	let xxx = ""+i;
	getLogger().info(xxx)
	await new Promise((resolve) => setTimeout(resolve, 500))
}


await new Promise((resolve) => setTimeout(resolve, 15000))

getLogger().end(()=>{console.log("logger end.")})

the number of logs 100 been push is aways greater than the number of grafana cloud console info Total: 82
I have tried different size and interval
I have countered the log lines content, the order is right , but some are lost