After talking to support, I was able to resolve the issue by resetting the embedded controller (hold the power button for 30 seconds, don’t worry if the laptop turns on/off while doing this) and resetting my BIOS to defaults (press F9 in the bios config menu).
I’m not sure what I did to get into this situation in the first place, as I’ve now restored my bios setup to exactly what it was before without the issue reappearing. But anyway, it’s fixed now.
Shoutout to the amazing support team and their quick and detailed responses!