That’s why it can move. Generally speaking, when you deal with Pawns, you want to use Movement Input, not Tick - many reasons, too numerous to list.
Your character is using movement input to move; since the extra camera is also a Pawn now, we can move it properly with movement input as well!
This way we do not rely on Tick executing all the time.
Also instead of Set View Target on Begin play, you can have the camera be automatically possessed:
Disable this on the character. This way you’ll start with the camera possessed.