Yes, it's indeed yet another sad "enhancement" to the benefits. Credit where credit is due - the lounge receptionist was very good to let you in, J.
Now, the policy is that you need to be flying VS with SQ PPS or Elite Gold in order to access the VS Clubhouses. No more access with SQ F or J BP.
How was the HKG-SIN flight in any case? I hope you were satisfied with the F&B offerings!