JJ2+ 6.3 introduced many options and modifications to the bullet physics. To me, it feels like the bullets have lag now. Hitting things was much more reliable prior to this update. The abundance of physics configuration options fragments in an unintuitive way what was once a unified and consistent game experience. I think we should at least have the option to run on unmodified physics, not an aproximation of it.

zero the issue u described where a bullet hits u after u killed the one who fired it appeared long before 6.3.
the bullet features of 6.3 are a rly good improvement and it seems like they are not the cause of the issue u re describing since we noticed this a long time ago already. also that issue doesnt happen that often.