Streaming traffic different on two cloud provider

Hi guys,

I’d deploy two Jitsi on both GCP and Digital Ocean. And I’ve discovered something strange.
On the same testing case. GCP takes three times more traffic than Digital Ocean. I’ve no idea what’s the reason cause this situation.
BTW, I use iftop to monitor the traffic on the JVB, I’m pretty sure it’s not caused by my client-side internet. (Because two testing case is in the same internet)