Same here, couple of months using with same symptoms. Had Microsoft mouse 15 years before and wheel was fine whole time. Wheel on M$ uses optical sensor while Razer uses mechanical contacts. Maybe the redesign using an optical sensor would help.
I’ve seen a YT video of cleaning wheel sensor on Deathadder & Viper, where they use a small mechanical sensor with contacts. I’m able to fix it, but it’s going on claim. It should last a lot more than a couple of months.

I've owned the Razer Viper 8k for 2 months. Recently I have a problem with my mouse wheel, when I scroll down it sometimes scrolls up a random few ticks and vice versa too. I also reinstalled Razer synapse and did the firmware.

Hello quickQUARTZAzure511,

Sorry to hear about your Razer Viper 8KHz scroll wheel issues. Here are a few more steps you can try:

1. Use a can of compressed air to gently blow away dirt under the affected buttons.
2. Test the mouse with a different system without Synapse.

3. Perform a clean reinstall of Razer Synapse if the issue persists.

4. Uninstall the mouse driver. After the uninstallation process, your Razer mouse driver will automatically reinstall.

If none of the steps worked, PM me your device serial number and proof of purchase so I can check for replacement options. All the best!