Why my tests are executed twice in Queue Mode? Why CI node runs whole test suite again?

This may happen when you use not supported CI provider by knapsack_pro. It's because of missing value of CI build ID. You can set unique KNAPSACK_PRO_CI_NODE_BUILD_ID for each CI build. The problem with test suite run again happens when one of your CI node started work later when all other CI nodes already executed whole test suite. The slow CI node that started work late will initialize a new queue hence the tests executed twice.

To solve this problem you can set KNAPSACK_PRO_CI_NODE_BUILD_ID as mentioned above or you can set KNAPSACK_PRO_FIXED_QUEUE_SPLIT=true. Please read this.