Problems with CesiumOriginShift

[SimonLation]

Seems like the same issue in the second post you linked:

CesiumOriginShift error

We’re not sure why, but the CesiumOriginShift component seems to be causing issues with the camera/player when they are moving at fast flight speeds. We have a CesiumOriginShift component on our flying player. When we move fast enough, thats when we begin to flash between 2 points and when using camera lag it breaks it, causing it to snap to the player. Disabling CesiumOriginShift fixes the issue, but now, if the player moves far enough away, ‘down’ is no longer towards Earth’s center. Is there…

I’m not sure if the third person character uses the spring arm component though? Have you tried the solution there (a modified version of the spring arm I believe.