M2MQTT Cant receive message after few publish

[inuside21]

I currently using M2MQTT Client in C#.

When i try to use this in client

for loop 0 ~ 1000 {
mqtt publish
}

The subscriber in the same application receives a message from 0 to 50, after that it cant receive anymore, even a single publish. I need to close the application for it to receive again.
But when I check in mosquitto client, it receive all messages from 0 - 1000.