The bug
Breaking or sprinting on a cauldron will result in dark blue particles similar to, but not the same as, obsidian.
Linked issues
is duplicated by 10
5 more links
relates to 2
Attachments
Comments 23
Ostensibly this is caused by the biome water tint, so stands to be independent from the other ticket
See MC-1874. This case is not on that report.