For sure you have meet this issue before: after compiling the code, you get objects in the current layer (most likely USR) that are showing as changed although when doing a compare you have no differences (or so it says). I just got it again today and recall to mention it for whoever is looking for a reason.
So, at least at the Forms level, this is simple: new fields added in standard Field Groups, that are not refreshed in the form on the development layer, whatever that would be; the compiler detects them and has to create the nodes in the form on the current layer, when compiling.
The fix, easy: open the client on the proper layer/model and just do a compile on the form (when it's not already on the higher layer - because if it is, then this won't create the controls in the layer anymore, and you would have to cleanup first).
So, at least at the Forms level, this is simple: new fields added in standard Field Groups, that are not refreshed in the form on the development layer, whatever that would be; the compiler detects them and has to create the nodes in the form on the current layer, when compiling.
The fix, easy: open the client on the proper layer/model and just do a compile on the form (when it's not already on the higher layer - because if it is, then this won't create the controls in the layer anymore, and you would have to cleanup first).