Predictive Intelligence and a Flow

[Sky4]

I'm using a classification definition to predict the Supporting Service of all incidents newly opened via email or self-service. I'm also using a Flow to get this prediction and assign the Supporting Service for the incident accordingly. When I test the Flow within Flow Designer, everything seems to work perfectly fine. However when I create a new incident, for instance via self-service, it appears that my model returns an error. I'm also using the exact same incident to do the test inside Flow Designer, so I'm really baffled. Here's what I see in the test results / flow context when I look at the outcome of the classification prediction action:

Test result:

Flow execusion context:

Can anyone tell me how it is that I get these two different outcomes, even though it's the exact same incident? I'd really appreciate any tips!

[nschneid]

Why is my flow able to find the ml solution when I manually run the flow with an already created incident but my flow cannot find the ml solution when the flow runs automatically via a newly created incident? 

I am in the exact same boat as Sky4 and unfortunately none the comments here are helpful.

[HeatherSN]

It is possible that this issue is related to ACLs being enforced due to Query String hardening initiatives.  
When a user without ML-related roles creates an incident, the following error might occur:
"Part of the query on ml_capability_definition_base has been ignored because of insufficient access for 'query_match' operation on ml_capability_definition_base.table."

Try adding ACLs granting the necessary access (for ML) to the users who are creating incidents to see if that addresses the issue. 
https://www.servicenow.com/docs/bundle/yokohama-intelligent-experiences/page/administer/predictive-i...

[qprinsloo]

I ran into this same issue this afternoon. Found that setting the "Run as" to "System User" on the flow resolved the issue. So it does indeed appear role based and related to the ability to read the ml definition record.