Hi pinpins!

So i am trying this pool for the first time and i've got an issue of hours of inactivity starting to show up quite frequently.

My wallet : MSzyGNMY6nah63N7CtENcJZ4zZT6fxUWFq

https://gyazo.com/07b8d90308b0b0cd51f1921af5c03997

As you can see it's flat two times for about an hour.

https://gyazo.com/aae9779b9c2a2c60987d11fe27c541ca

Also it's mining the same coin which supposed to give shares every ten minutes or so...

Can you tell me what's going on ?