https://forums.focus-home.com/topic/38579/world-war-z-patch-1-0-3-ps4
PS4 Patch Notes
Stability:
Fixed an issue that caused save file corruption.
Fixed an issue with save backups restoring saves with 0 progression.
Fixed a large number of connectivity, matchmaking and party system issues.
Fixed a large number of gameplay crashes.
Fixed a large number of gameplay bugs that caused inability to progress in levels.
Gameplay:
You will now only gain XP toward weapon upgrades if you have purchased the prior upgrade for that weapon, i.e. level two must be purchased to be able to gain XP toward level 3.
Fixed an issue that caused excessive aim assist in PvPvZ.
Reduced Compact Shotgun damage in PvPvZ.
Increased cooldown of “Please Stand Up” perk to 60 seconds.
Marking items will now display its icon for your teammates.
Reduced AI bots effectiveness especially on easy and normal difficulties.
Increased objective timer to save friendly NPCs to 60 seconds on easy and normal difficulties.
UI:
Minor fixes in UI and localization.
Trophies:
Fixed an issue with “Strong immunity”, “High caution” and “The most effective way” trophies, which caused the goals to fail if you have failed them once during one game session.
Fixed an issue with the “Sport kills” trophy, which was harder than intended to get.