Same problem, can't see own posts.
Posts were visible, until they stopped being visible yesterday. Post count says 34 (seems about right), post page is empty.
Today I noticed I cannot see posts in the (very small) communities of my home instance, although I know there were a few. Can also not see the post I made there about this problem.
Language was set to 'Undetermined, English, German' since I registered 9 days ago. Never changed it after. I don't think my case is related to language settings (referring to the other comment thread here).
Also I can see my comments, just not my posts.