Aftermarket threaded barrels on my G19, G21, and 2 G26's. No issues. Still have and use the originals too. Threaded stays on the G21 for house use, just in case.
And like the husband said about our Beretta Neos, “they made that bitch on a Friday afternoon!”There can always be issues with anything, regardless of the fact that they are factory or aftermarket.
Maybe it was a bad day on the assembly line and you got a bad batch.