Generally, yes you can swap extractors. Ensure both extractors are of the LCI (loaded chamber indicator) type.Can I swap the extractor from a G19 and use that in my G26?
Older G26 models may have a non-LCI type.
The two different extractors should have different SLBs (spring loaded bearings).
I'm sorry you didn't already do this the last time you were at the range. We all could have narrowed it down to the actual cause by now (hopefully).
I'll ask again, is the EDP installed correctly (in the correct direction)?
When you have both extractors out, it'll be easier to compare if there is any chipping or missing material.