Cam Ranh Bay won't stay changed after capture

[thebeis]

Hello,
Campaign Game #15, Version 1.60 - Started Fresh

I invaded Vietnam with China forces and took Cam Ranh Bay. The next turn it was a green allied base. BUT the command was Southern Fleet. Spent PP to change it to China Command. However, it reverts back to Southern Fleet.

Not sure if there is any negative impact. My forces there seem to be recovering.

I seem to recall similar issues before other patches.