Issue regarding API call from Power shell to Jira

[Deleted user]

I am trying to post a comment to Jira issue from PowerShell but i am getting the following error given below:

Invoke-WebRequest : The underlying connection was closed: An unexpected error occurred on a send.

I am using Jira cloud. The posting is happening intermittently but sometimes it throws the above error. Is it because of special characters in messages, If so what are the allowed special character in posting to Jira or do we have escape sequence for it. please help