Huntsman repeated/missed keystrokes

I have a Huntsman keyboard that was purchased in Australia in December 2019. Ever since I got the keyboard it has had issues with repeated keystrokes. Sometimes the keystroke will repeat indefinitely until I tap the key again. I also have issues with keystrokes not being registered, even though the key is well beyond the actuation point. These problems have only gotten worse over time.

- I have Synapse installed in Windows 10. The problem also occurs in Ubuntu.
- I have tried taking off the keycaps and cleaning them.

Is the unit faulty, or is this expected behavior for the Huntsman keyboard?

Secondary to this issue:
Trying to contact through Razer support (https://support.razer.com/warranty-support/) does not work. The serial number is not recognized and trying to submit a more general inquiry is met with "Network error." This occurs independently of the browser (Firefox, Chrome, Brave).