Hey /brg/

My PTR91 started automatic firing at the range a few weeks ago. I was sighting in some optics and just having fun at 50m when all of a sudden my shots were inaccurate AF, like not even on my target sheet, then *gat-gat-gat*.
Took it to the local gunsmith who said he fixed it, but my second shot was a double tap... .
What do?