On the 5th September 2018 Frontier released the patch notes for 3.2.1. The update itself didn’t occur until the following day, the 6th September. You can see the details below, or find them in the Elite: Dangerous – Patch Notes page.
Fixes and Improvements
Alliance Challenger, Chieftain & Crusader
- Fixed various visual issues with hardpoints.
Lance Guardian Fighter
- Addressed an overheating issue when firing
Weapons & Modules
- Fixed large missile racks being unable to resupply ammunition using synthesis