Transition to shutdown state: MCU 'mcu' shutdown: Timer too close

Basic Information:

Printer Model: TronXY X5s
MCU / Printerboard: SKR 1.3
klippy.log klippy (6).log (3.5 MB)

I’m using a RPi 3B+ with SKR 1.3 (connect via UART), then a BTT EBB42 v1.2 + BTT U2C v2.1
RPi is powered via LM2596
I modified klipper/klippy/mcu.py
TRSYNC_TIMEOUT = 0.05

I keep having “MCU ‘mcu’ shutdown: Timer too close” when printing a test cube.