Intermittent 'ServiceApiError' when running splitting the pdf

Hello, 

An exception intermittently is raised whenever running the splitPdf.js for adobe pdf services. Now we are running it for various pdf's and for some it works and for others it doesn't. 

I've pasted the exception below:

Exception encountered while executing operation { ServiceApiError: An Internal Server Error has occurred.; transactionId=e97HT6BynCTIl3ukGpRuejdmlhae5iKh
    at multipartResponseParser.parse (/home/ubuntu/projects/PDF-extraction/node_modules/@adobe/pdfservices-node-sdk/src/internal/api/cpf-api.js:197:20)
    at IncomingForm.<anonymous> (/home/ubuntu/projects/PDF-extraction/node_modules/formidable/lib/incoming_form.js:107:9)
    at IncomingForm.emit (events.js:198:13)
    at IncomingForm._maybeEnd (/home/ubuntu/projects/PDF-extraction/node_modules/formidable/lib/incoming_form.js:557:8)
    at JSONParser.parser.onEnd (/home/ubuntu/projects/PDF-extraction/node_modules/formidable/lib/incoming_form.js:532:10)
    at JSONParser.end (/home/ubuntu/projects/PDF-extraction/node_modules/formidable/lib/json_parser.js:29:8)
    at IncomingMessage.<anonymous> (/home/ubuntu/projects/PDF-extraction/node_modules/formidable/lib/incoming_form.js:132:30)
    at IncomingMessage.emit (events.js:203:15)
    at endReadableNT (_stream_readable.js:1145:12)
    at process._tickCallback (internal/process/next_tick.js:63:19)
  requestTrackingId: 'oQ1CospURlRdtbEBEldnVbfUaLszTvWI',
  statusCode: 500,
  name: 'ServiceApiError',
  errorCode: 'INTERNAL_SERVER_ERROR' }

Node JS version: 16.13.2