Generated Pointed Dripstones are not merged when they should

Sometimes generated Pointed Dripstone doesn't have the 'thickness=tip_merge' block state set when it should.

This may be intentional.

How to reproduce

1- Create a world with 'single biome' world type and biome set to Dripstone Caves

2- Enter a cave and search for pointed dripstone

3- (This doesn't always happen) You will see that some pointed dripstone has 'thickness' set to 'tip' when it should be 'tip_merge'.

This is not a duplicate of MC-207254:

As MC-207254 is about pointed dripstone merging when it shouldn't, this is about pointed dripstone not merging when it should.