PS4 Keyboard Lag/Dropped Keystrokes

[Keres]

Every time I start to enter text into the in-game chat box, there's a small period of lag at the beginning where key inputs usually get dropped. For example, almost every time I try to say something, the first few keystrokes come out as "/1[message]" instead of "/l1 [messsage]" unless I type it extremely slowly and deliberately. Once the edit box is open and you're continually typing, though, it seems to be fine. Even with the DualShock 4 turned off entirely, this still happens.

I've also seen a separate issue where opening the system menu via the "ESC" key gets delayed for several seconds (but other keys, such as movement via WASD, still works fine in the interim). This happens intermittently and largely unpredictably.

Time: 5/22/2014, 8:00 PM MST
Frequency: Sometimes
World name: Excalibur
Character name: Taja Shin
NPC name: N/A
Monster name: N/A
Class/Level: N/A
Party or solo: N/A
In-game time: N/A
Area and coordinates:
Steps:
1. Open the chat box via the Enter key or the "/" key, and attempt to type something quickly. Usually, at least one keystroke will be lost.

Connection Specs
- Cable, Cox Communications
- Motorola SB6120

Model Number of the PlayStation®4 You Are Using
- Model Number: CUH-1001A

Information About the Peripherals You Are Using
- Logitech Wireless Mouse/Keyboard combo MK320 (~6' distance from receiver)