Yes it is exactly as Harris says. It’s one of those things in Blender you have to develop a muscle memory for. If you scale an object in object mode, it must become second nature to instantly hit Control + A and apply the scale. Otherwise you’ll start working and you’ll add everything on top of an object that Blender thinks its transforms are other than what they actually are. And then it’s a pain to correct because once you apply the scale and Blender goes oohhhh so you mean this object was this scale and not the other? And now all the values in the modifiers because wrong for the newly applied scale and everything becomes a mess.