@girish You're right, I think not.
Currently the app is NOT in a 'Running' state if any failures occur.
An alternate method would be to bring up the app anyway (as long as the primary subdomain is up, and continue to resolve the failed API calls until some 'threshold' (then alert) or it succeeds and all is well.
No need to ignore the failed ones, they just try again async as with your API rate backoff code, or at the next addition of a new sub if you want to be less proactive and more lazy. (The non working subs, if used will draw attention back to the app anyway.)