Different tradies have different levels of care when it comes to pulling and replacing floorboards, but they’re always going to move more once they’ve had the tongues cut off the boards and they no longer interlock.
Victorian house: no tongues on the boards. Edit, to be clear one of the sections of boards near the wall wasn't fixed back at all, just placed, loose, in position.
Different tradies have different levels of care when it comes to pulling and replacing floorboards, but they’re always going to move more once they’ve had the tongues cut off the boards and they no longer interlock.