Should correct usage of object and subject pronouns as possessive pronouns, etc.

**The Error**
I've been enjoying Harper for a while, but I recently noticed this grammatical error both in Obsidian (where I usually work) and in the actual Harper website (where I've come to test this error further) where it doesn't flag the use of "him" as a possessive pronoun. Furthermore, it also doesn't recognise the proper usage of subject nouns and sees the other word as a verb ie. home to homes, own to owns.

**Examples (2-3):**
1. Examples from obsidian.

2. Two of the examples on Harper's website.

**References**
(https://www.thoughtco.com/subject-object-possessive-pronouns-4176482) Apologies since I'm not a grammar expert and I can't really tell exactly what is wrong.

Reproduce the reported sentences in Harper's website and in Obsidian, then trace which grammar rule treats “him” and the subject-noun examples as verbs. Done means incorrect pronoun usage is flagged while valid subject and possessive forms are accepted.

Written by the indexing model from the issue text.