Change Tracker events lost on pooled context

[pinkfloydx33]

When using a pooled DbContext, the SavingChanges and SavedChanges event handlers are preserved between uses of a context. However event handlers added to the change tracker, ie ChangeTracker.Tracked and ChangeTracker.StateChanged are lost.

I have no idea if this is expected or not, but it does feel like a disconnect where one set of events is preserved and the other is not. I was unable to find documentation indicating the expected behavior for the events individually or as a whole.

I am not sure if this is a bug, working as intended or needs to be a potential feature request. If this indeed sounds like a bug I can provide a reproduction. I am on mobile at the moment so unable, but will follow-up accordingly.

Include provider and version information

EF Core version: 6.0.2
Database provider: Npgsql/Postgres
Target framework: NET 6.0

[ajcvickers]

Note for triage: see #17086.

[AndriySvyryd]

This is a bug, we missed resetting ChangeTracker.Tracked and ChangeTracker.StateChanged to the saved values