Via the Steam Community:

Client Performance

• Optimized Care Package airplane
• Improved UI performance

Bug fixes

• Fixed an issue where the starting airplane became immobile in sky at the very start of a round
• Fixed inventory display issue on 4:3 resolution
• You can always spectate your teammate's screen in color now
• You can no longer fire weapons in a vehicle from underwater
• Fixed an issue when you could not pick up mags from some areas of the lobby (starting island)
• You no longer have to press the F key to pass through doors destroyed by grenades or Red Zone bombs
• Fixed an issue whereby if you got knocked out while zooming in with a scope, you won't be zooming in when revived
• Fixed an issue when grenades were not available to throw periodically
• Fixed an issue of armed weapon not getting displayed on HUD UI, when switching weapons with number keys while having inventory open