How to reproduce:
1 Load up a new world
2 Locate sulfur caves
3 Jump on sulfur spikes
Observed result: No damage is taken
Intended result: Just like dripstone, there should be 1 HP damage.
This is a consistency issue, since sulfur spikes function the same in every other way.
This feature has not been added to Bedrock yet. Please don't create bug reports for things that haven't been added yet.