Objects are moving miniscule amounts in Editor mode

I’ve noticed whilst placing objects and moving them in the Editor that they appear to be moving miniscule amounts despite the game not playing.

For instance, I would set the local position to be, say, 0.0 exactly.
I’ll deselect the object then return and I’ll see it is now at 1.907349e-06 (copy pasted from one ship example). Some are slightly higher at 5.00002. I have to force set the values but again, sometimes they will revert to these ever so slightly changed values.

Visually obviously it isn’t noticeable (but it does seem to happen to children of children etc so I can imagine it eventually in extreme cases causing noticeable problems)

What kind of components are attached to the objects?