Cloud Storage the deleted file still accessible - node.js

Question

I am deleting a JSON file from Cloud Storage. However, this file I deleted is still accessible. I know it sounds silly. When I list the files that exist in cloud storage, this file is not listed. However, I can access this file with the URL.
I'll try to give you an example.
I'm calling the file from cloud storage with Postman:
[
{
"_id": "60ad0e33b7161e270d7f9bf2",
"id": 1,
"city": "Rotterdam",
"hours_0_sun": 2.4,
"daily_0_temp_day": 11.5,
....
},
{
...
}
]
When I remove the file
const key = `someid-someid.json`;
const bucket = storage.bucket(process.env.GCLOUD_BUCKET_NAME);
const file = bucket.file(key);
const response = await file.delete();
And call the file again:
[
{
"_id": "60ad0e33b7161e270d7f9bf2",
"id": 1,
"city": "Rotterdam",
"hours_0_sun": 2.4,
"daily_0_temp_day": 11.5,
....
},
{
...
}
]
File's still accessible...
When I try to get the file from storage:
//Find file
const options = {
prefix: `someid-someid.json`
};
let files = await storage.bucket(process.env.GCLOUD_BUCKET_NAME).getFiles(options);
console.log(files);
Console:
[[]]
This is driving me mad. Is this normal? How can I delete the file completely?
Note: When I delete the file, I can't see the file from the storage browser too. So file doesn't exist in the storage. But still accessible...

Answer 1

I found the problem thanks to #Kolban he mentioned CDN caches in the comments.
I setted 1 hour caching options while I uploading the files to cloud storage which is I totaly forget.
I changed 1 hour to 1 min and problem solved!
await bucket
.upload(filePath, {
destination: key,
gzip: true,
metadata: {
cacheControl: "public, max-age=60" // 1 minute caching
},
public: true
});