Looks like it is still there despite the absence of the reducer. Time to go hunting around for the reflection.
1. point to a bright star and just put it outside the field to reproduce the reflection. Then remove the camera and look up through the optical path to see where the reflection is located.
2. Do the above with and without the light pollution filter. This might be causing the issue.
3. If the LPF is the cause buy another screw in version rather than one so close to the sensor.
4. If it is the baffle (not likely) then time for the flocking.
Get back to us again, when you have eliminated a few more things.
