Thanks for the suggestions. Yes, I’ve already tried all of these steps, including charging the headset directly from a wall outlet with the original cable, leaving it connected until the headset indicates that it’s fully charged, updating the firmware using the updater, and power cycling the headset.
Unfortunately, the issue is still happening. The battery percentage in Razer Synapse keeps changing inaccurately and inconsistently, even though the headset itself continues to work normally.
I’ve also already contacted Razer Support and provided them with screenshots, a screen recording, and the requested information. I’m trying to find out whether this is a known software issue that other Razer users are experiencing as well.