Post Comment on Feed Intermittent Issue with Deactivated Author

Hello, in a process I am using "Post Comment to Feed Entry", the value of author being passed is a user who is deactivated.

This process sometime works fine and intermittently gives me generic error as below-

An error occurred while trying to post a comment or hazard to the feed (entry id: [382]). Details: The supplied feed entry [382] is not accessible (APNX-1-4181-100)

This is strange behavior, any idea why does it work sometime because I believe passing deactivated user as author should give an error always.

TIA!

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