OK I'm really confused by now...
Today I turned on Chrome by usual, leave all of my extensions turned on by normal, 2 fresh tabs for each window, tried to create a new tab in a window, moved that new tab out of that window, then moved back in, the bug is not there...
Ok after new test I found out that when I drag a tab out of those 2 old windows, leave it there. I tried to drag another tab out of one of those two windows and dragged back in, the bug occurred again...
Now I will try turn off all extension...
Edit: uploaded a new video, but because it contains private information so I sent it as a private message to @AzDude. And of course, in that video, the flickering bug occurred...