Brax3 with latest iodeOS 7.7-20260724-brax3 - will charge to 92% and then repeatedly buzz and alternately show as charging / not charging.
Battery info shows: health good; design capacity 4964mAh; maximum capacity 4946mAh (99%). No special non-stock battery settings and no battery management apps.
Same with OEM cable, other cables and various charging adapters and ports.
if you can try another charger. If the charger is the one from brax there might be an issue with that one. I’ve not been able to pin down the issue since it seems so random other than it seems to be related to charging control.