Have anyone experienced fails with webhooks verification?

I have some troubles with webhooks. For unknown reasons Webhook's verification fail for one particular customer. But not for all the time. Sometimes it succeeds (I'd say it fails 1 out of 10 ).

Do you have any tips on how to debug this issue? I logged the payload and it doesn't look suspicious. Just a regular user.tag.created event.

Here is how I verify webhook

```

const verifySignature = ({payload, secret, signature}) => {

const stringified = JSON.stringify(payload);

const calculatedSignature = `sha1=${crypto

.createHmac('sha1', secret)

.update(stringified)

.digest('hex')}`;

if (calculatedSignature !== signature) {

throw badRequest(`Invalid signature provided`);

}

};

export const verifyWebhook = ({clientSecret}) => async ({params, payload}) => {

verifySignature({

payload, //req.body parsed by koa-body

secret: clientSecret,

signature: params['x-hub-signature'],

});

return {id: payload.app_id};

};

```

Thanks in advance for any insigths!