Post 1/30 Patch Keyboard/Mouse/Performance Hitching
Hello,
Since the January 30th patch, I have been getting a consistent issue where my mouse/keyboard movement is "hitching" while controller movement is smooth. I've seen various threads about this, but what I have not seen mentioned is that the problem gets worse each time I alt-tab whether in fullscreen, borderless, or windowed. In addition, the game executable responsiveness worsens each time, with the game taking longer and longer to become the primary window again. The "lag" will go back to normal after a game reboot, but any alt tabbing will cause it to happen again. The mouse/keyboard hitching is present as soon as the game boots and I enter the range. No matter how intense the mouse and keyboard hitching becomes, picking up and using my controller immediately removes all hitching.
This issue was not present prior to the 01/30/26 update, and neither update since then has made improvements.
Things I have tried:
-Lowering all graphics setting to lowest possible, plus playing in the very small default window size
-Swapping between every variation of vertical sync, g-sync, and adaptive sync, DLSS, etc. between the game, Nvidia Control Panel and my monitor's software
-The "press no keys on launch" workaround that is discussed in some of the threads around this topic
-The "the first 4-8 keys you press will be excluded from the bug" workaround that is discussed in some of the threads around this topic
-The "hold alt" workaround that is discussed in some of the threads around this topic
-Swapping mice and keyboard
-Swapping USB ports
-Removing unnecessary USB devices
-Disabling all overlays (Discord, Steam, NVIDIA)
-Restarting computer
-Verifying Battlefield 6 file integrity through Steam
-Verifying EAAntiCheat file integrity through the installer application
-Force updating EAAntiCheat through the installer application
-Updating video card drivers
-Performing a full reinstall of Battlefield 6 and EAAntiCheat
-Enabling/Disabling XMP
None of these attempts have made any difference. I have also monitored all logic cores on my CPU through task manager, and do notice the EAAntiCheat.exe process spiking CPU usage during mouse movement.
My system configuration is:
Mobo: MSI MAG Z790 Tomahawk Max Wifi (with updated bios firmware for the Intel 13th-14th gen issue)
CPU: Intel i7 14700k
RAM: 2x G.Skill DDR5 32GB sticks
Video Card: MSI NVIDIA GeForce RTX 4080 w/ 16gb vram
Mouse: Logitech G600
Keyboard: Corsair K70
Controller: Xbox One wired USB
I've attached three videos of the issue. The first (bad mouse movement to controller smooth) is 10 seconds of mouse movement on a fresh boot of the game, followed by controller movement. The second (bad mouse movement after smooth controller) is immediately after with one alt-tab instance going back to mouse/keyboard. The third (multiple alt tab mkb to controller back to mkb) is after multiple alt-tab instances first with mouse, then switching to controller at the 7 second mark showcasing smooth movement, then switching to keyboard to show the "lag" and stickiness on input registration by alternating strafe keys (A/D), then more mouse movement.
Once again, this issue was not present at all before the 01/30/26 patch.
Thank you, and please let me know if you have any questions.
Edit: I have uploaded the clips to youtube for ease of access.
