The pwm is generating ramp signals when using sensor with i2c interface

hello everyone, I am trying to combine a H-bridge-based motor controller and a sensor connected by i2c with stm32g032k8txx. They both work when i run on different microcontrollers, but when I combine them, the sensor is working fine but the PWM of the STM32 gets abnormal, like the output is something like a ramp signal (the motor initially starts at a slow speed and gradually increases to a high speed and stops. After some time, it starts again). Please help me if anyone knows about this problem.