Just because the behavior isn't what you think it should be, does not mean it is unintentional.
If you think it's bad behavior, there is an ideas forum for that where you can suggest a good suggestion to change it to.
In this particular case, I think DarkGod is iffy about petrify as a status-and anything that disables actually getting turns-anyways, so if you have a good idea of what to change Petrify to, mechanics-wise, while still making sense to be petrification, that would be even more useful.