Objects randomly group each other..

Hi the objects in my scene will just sometimes randomly group with each other and I can never undo it then, I don’t know how it happens or what I do, but when it happens my whole scene gets messes, up how can I stop it from happening or how can I undo grouping?

Thanks

When you are in object mode, do you only click one object and then go into edit mode or do you accidentally press A and select everything in object mode then go into edit mode? Other than you pressing Ctrl+J i think that this could be it. Also, are you duplicating a mesh in edit mode? If so they will be joined. You must Tab back into object mode before duplicating.

Well yeah I switch very fast between edit mode and object, so I could have pressed A in object mode and then moved the edit mode.

lol k. To complicated problems like this, they’re usually done on accident with just one push of a button, yet they’re very hard to find what caused the problem XD