it’s not correct.
I upgraded from a H2S to H2C, the AP board is slightly different. This is why Bambulab includes a new AP board inside the upgrade kit.
I have this problem too. Went to print a single color (red) job with a previously assigned nozzle to the same filament. Studio made the correct nozzle choice for the job as #6 and then upon start it docked #1 from the head and loaded #6 only to immediately return #6 and grab #1 again and purge my white nozzle with red and print the job.