MLX90640 Thermal Camera with Trackball Breakout (PIM447)

The trackball (PIM447) doesn’t seem to be able to cope with the required I2C bus speed for the thermal camera:
setting in config.txt:
dtparam=i2c1_baudrate=1000000

I get errors:
> ioctl(self.fd, I2C_RDWR, ioctl_data)
OSError: [Errno 121] Remote I/O error

and

raise RuntimeError(“Invalid chip ID: 0x{:04X}, expected 0x{:04X}”.format(chip_id, CHIP_ID))
RuntimeError: Invalid chip ID: 0x0000, expected 0xBA11

I am testing it on a Pi 4 Model B / 2GB

Is there a way I can both use the thermal camera and the trackball?

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