Slow serial port communication speed after switching H743

After switching to a new flight controller, Telemetry device that Drone Bridge’s ‘Received bytes serial port’ dropped to about one-tenth of what it was before. Additionally, QGroundControl fails to complete the parameter download.

The first flight controller I used was the Flywoo F745 AIO. The new one is the Micoair743-AIO.

The port numbers and baud rate settings are correct.

Does anyone have any idea what might be causing this?

Before speed around 20kbit/s
2024-11-27_21.01.32

After speed around 1.5kbit/s
2024-11-27_21.01.55