Fired up the camera and got greeted with a large dose of confusion.
Depending on the scene, the image can look completely fine for some scenes, but show varying degrees of bright vertical lines for others.
Here is an extreme example of this.
It seems to be somehow related to the FFC, because they change every time the FFC triggers. The lines can be either static or slowly moving horizontally.
Is this an effect of the camera warming up? After sitting powered for around 10-15 minutes it seems to be fine and showing what is expected. Is this normal of does it point to some sort of a defect of the camera? Not quite sure yet if how it would behave when given the opportunity to cool down again.
EDIT: Based on current observations it looks like something weird related to the power supply system, looks like the camera works totally fine when attached to a charging cable or when the battery is totally full, when the battery gets slightly drained (3/4 bars capacity remaining), this vertical line thing starts appearing, even with a camera that has warmed up.