Wiki Discussion

How the discussion system works in the wiki? I did a small update in Item Data Format. There were comments about the page in the discussion system but they vanished after i did the update of the price fields.

I believe the comments about a page vanish after any update on the page, even if they are minor updates unrelated to the discussion. Please, can someone confirm it? If it is true, is it possible to update the page without erasing the comments? It was not my intention to delete them.