ICM-20948 INT1 Pin Voltage range(configured open drain)

Hi,

I am curious about the voltage range of ICM20948 INT1 pin when it's configured as Open Drain.
ICM-20948 has 1.8V voltage for VDDIO. I need to connect INT1 pin to Microcontroller which is working on 3.3V IO.
So I configured the INT1 pin to Open drain and add Pull-up resistor to 3.3V voltage source.
And I found the HIGH voltage rose up to around 2.2~2.3V max whereas I expected to be 3.3V.

So I am wondering if there is any voltage limit on INT1 pin with VDDIO = 1.8V and open drain setting with P/U resistor.

Please help me to resolve this issue.
Thank you in advance.