Upon Lead Convert, sometimes the new Opportunity Owner remains the user who converted the Lead rather than the Lead Owner
|Knowledge Article Number||000227529|
|Description||In some cases, users may notice that converting a Lead owned by another owner results in the new Opportunity created in their own name rather than the Lead owner. This is currently a known issue and only occurs under the following circumstances:|
|Resolution||1) The Org must NOT have Person Accounts enabled
2) There must be a Trigger or Workflow in place that updates the Owner of a record (such as Accounts) on "Create"
3) The Org must be using the new Lead Convert behavior (most are).
If the above is true, Opportunity owner on Lead convert will default to the user converting the Lead.
A Known Issue is also published here: https://success.salesforce.com/issues_view?id=a1p300000010wDqAAI