Making REST call twice.

[rrohitesh]

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[ +] bug report => check the FAQ and search github for a similar issue or PR before submitting
[ ] support request => check the FAQ and search github for a similar issue before submitting
[ ] feature request

Current behavior
I am using this library and i found that the rest calls are getting called twice or some time more. For conformation i disabled this library and found that now only one call is happening.

Expected/desired behavior

Reproduction of the problem
If the current behavior is a bug or you can illustrate your feature request better with an example, please provide the steps to reproduce and if possible a minimal demo of the problem via https://plnkr.co or similar.

What is the expected behavior?

What is the motivation / use case for changing the behavior?

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