Hello @Piotr_Laczykowski ! 
I’ll take a look into your issue. I can see you’ve done some troubleshooting with Ann, still, I would like to try a couple more things.
I worked on another Community thread similar to yours. Could you please try my suggestion here: SonarCloud Pull Request Run not working - #19 by aura ?
In your case, the URL would be something like https://dev.azure.com/{AzureDevOpsOrg}/_apis/git/repositories/Spark_Ops/pullRequests/7619?api-version=6.0 (replacing the organization name with your own).
Could you please share your findings here following what’s mentioned in the other thread?