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Trigger function fails to execute at set intervals

See original GitHub issue

I have configured a NodeJS function to be triggered by a timer with the following CRON expression. The intention is for the function to be executed infinitely every 50 seconds.

*/50 * * * * *

However, I have noted that the trigger is not executed as expected. Here is the function execution log:

2016-06-30T19:34:52.109 Function completed (Success, Id=f1983e69-922c-47fd-b521-77f25fe7cad8)
2016-06-30T19:35:00.001 Function started (Id=98d3d465-2052-4413-a718-001e5c3679e3)
2016-06-30T19:35:00.111 Function completed (Success, Id=98d3d465-2052-4413-a718-001e5c3679e3)
2016-06-30T19:36:00.008 Function started (Id=8f1ab0b4-096e-4a10-9e39-4710a15974ac)
2016-06-30T19:36:00.102 Function completed (Success, Id=8f1ab0b4-096e-4a10-9e39-4710a15974ac)
2016-06-30T19:37:00.010 Function started (Id=329b400b-d6bf-468f-83a7-671b4724c052)
2016-06-30T19:37:00.088 Function completed (Success, Id=329b400b-d6bf-468f-83a7-671b4724c052)
2016-07-02T06:31:50.360 Function started (Id=dcb42d2b-6211-4f60-9339-8b7effa014de)
2016-07-02T06:32:08.065 Function completed (Success, Id=dcb42d2b-6211-4f60-9339-8b7effa014de)
2016-07-02T06:32:50.012 Function started (Id=7daff0ca-4237-40a5-abf6-1a105e97deac)
2016-07-02T06:32:50.121 Function completed (Success, Id=7daff0ca-4237-40a5-abf6-1a105e97deac)
2016-07-02T06:33:00.014 Function started (Id=72941597-1c6a-4f3e-89de-3d92c293c8d6)
2016-07-02T06:33:00.280 Function completed (Success, Id=72941597-1c6a-4f3e-89de-3d92c293c8d6)
2016-07-02T06:33:50.013 Function started (Id=7925044b-fcbe-4799-a404-6a1c451c8189)
2016-07-02T06:33:50.232 Function completed (Success, Id=7925044b-fcbe-4799-a404-6a1c451c8189)
2016-07-02T06:34:00.015 Function started (Id=85ab2f5f-881a-42da-b72e-05b57b73fba6)
2016-07-02T06:34:00.062 Function completed (Success, Id=85ab2f5f-881a-42da-b72e-05b57b73fba6)
2016-07-06T17:51:50.252 Function started (Id=c9ae8851-0636-4b7b-9d16-59e0db20f96d)

function.json

{
  "bindings": [
    {
      "schedule": "*/50 * * * * *",
      "name": "myTimer",
      "type": "timerTrigger",
      "direction": "in"
    }
  ],
  "disabled": false
}

Just wanted to ask for some help on diagnosing this issue.