@sidou - In my opinion that is not how you should interpret locking of profile. Locking means your details in application are freezed - age, ielts score, work history, personal history etc once you receive AoR
Eg, if your birthday falls after AoR but before application is approved, ideally your CRS should decrease by 5 points due to increase in age. However since age is locked at AoR, your CRS wont decrease for eligibility purpose.
Similarly, if your ielts score expire after AoR, but before application is approved, it wont affect your application.
I think profile is bound to expire on completing 1 year irrespective of whether you have ITA/AoR .
However, I am not an expert and suggest you seek expert opinion to avoid any kind of disappointment. Best luck !