Adobe pdf generation API - intermittent issue 502 Gateway timeout

While using this following api 

https://cpf-ue1.adobe.io/ops/{{create}}?respondWith=%7B%22reltype%22%3A%20%22http%3A%2F%2Fns.adobe.com%2Frel%2Fprimary%22%7D

to submit pdf generation request, most of the time we get response  with x-request-id, which we further use in poll api to check pdf generated.

But sometimes, intermittent issue is coming in above api with 502 response as 

{

"error_code": "504001",

"message"l : "Gateway timeout"

}

Can anyone suggest how to use this api fail safe?