Output payload ignored in "critical" TTL update

[kinnalru]

Ouput payload silently ignored when passed in "critical" TTL update API call.

put "/agent/check/update/:check_id"
with payload:
{
  "Status": "critical",
  "Ouptu": "This is critical error"
}

Result with empty Output section in consul health checks UI. 'passing' and 'warning' works as expected in docs.

If there is previous update with ouput, then it will be displayed in "critical" check after TTL expired as:

TTL expired (last output before timeout follows): PREV PASSING OR WARN OUTPUT

[jeromegn]

We have a service with a "critical" health check status, doesn't show any output.

I'm trying to debug this but I can't. Doing the same HTTP request directly to the service with curl works fine so I don't know how the consul health check is failing.