[M5TAB5]Display flicker issue. Is this a manufacturing defect?

[y-shibata-aqua-k]

Device: M5Tab5
Condition: Brand new (Out of the box)
SN: K14525120100251
Environment: Windows 11 / Arduino IDE 2.3.2 & 2.3.8
Board Manager & Libraries: Latest versions
USB Cable: Tested with 2 different cables
Battery Level: 98%
Tested Sketches: M5GFX -> BASIC -> BarGraph, along with custom printf and sprite drawing samples generated by Gemini.

Hello everyone,

I uploaded a sample sketch to my M5Tab referencing the official M5Docs, but I am experiencing an irregular screen flickering issue, as you can see in the below video.
https://youtu.be/X8-WdUFt3Ag

This symptom persists even if I change the drawing methods (such as using sprites vs. direct drawing) or alter the update timing for the text and background.

Has anyone experienced this exact same issue and successfully solved it?
Or is it highly likely that this is a hardware defect with my specific M5Tab unit?

Any advice or insights would be greatly appreciated. Thank you.