There is a severe bug in the Fandom system which causes an unpredictable number of comments to be lost if you rename pages that have more than 100 comments. See WikiProject Subpages for a list of recent cases.
The whole comment system on Fandom will be replaced with the introduction of the Unified Community Platform. See section Article Comments (Fandom) on this page.
Please do NOT rename any page with more than 100 comments until the Unified Community Platform has been introduced!