Hi @Romila baretto
I'm glad to hear you solve the problem ,if you have any issue about SharePoint, you are welcome to raise a ticket in this forum.
By the way, since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others.". and according to the scenario introduced here: Answering your own questions on Microsoft Q&A, I would make a brief summary of this thread:
Issue Symptom:
Issues are occurring on multiple workflows on different lists . Workflows not working on a site. A simple workflow in a new test list in this site collection seems to also not start automatically - unless started manually. And Emails not getting triggered. This results in "Not Started" "Initiator Anonymous" issue . Works fine on other site collections in the same web application.
All WF services running fine
Current status:
Eventually the issue got resolved by itself.
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