Hello, welcome to the Community, and thanks for reaching out. I can understand the inconvenience and frustration of having Bixby or Google Assistant opening when you don't want them too, and would like to look into this for you further. After an update, it may be a good idea to repair apps and clear your device's cache partition. This helps keeps device behavior acting more smoothly. Try these steps:
- Power off your device.
- While the device is powered off, simultaneously press and hold the power and volume up buttons.
- Once the Samsung logo appears, release both buttons. Your device should boot into recovery mode.
Using the volume buttons to navigate and the power button to select:
- Navigate to "wipe cache partition" and press power.
- Select yes to confirm.
- Navigate down to "Repair apps" and press power.
If the above troubleshooting isn't helpful, please submit an error report via the Samsung Members app. This guide details the steps to do so: https://www.samsung.com/uk/support/mobile-devices/how-do-i-send-an-error-report/