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By connecting the inputs together, it causes the bridge to enter Hi-Z. We recommend separating IN1L, IN1H, IN2L, and IN2H.
In addition, for IN1x or IN2x to be logic low, the voltage needs to be less then 0.2 x VCC. In this case, VCC = 3V and 0.2 x VCC = 0.6V. In your schematic IN2H and IN1L are 0.9V. The inputs are between logic low and logic high. We recommend lowering the voltage from 0.9V to less than 0.6V.