Should flag "suffered from defeat" when it should be "suffered defeat"

I just read this in Wikipedia:

> This is all despite key battles, including the Battle of Milne Bay, where the Japanese **suffered from the first defeat** of a land battle at the hands of an Australian Brigade, and the Kokoda Campaign, where the Australians prevented the Japanese reaching Port Moresby, the capital of the Australian Territory of Papua, in late 1942.

I double checked with Google's AI, which put it this way:

> Use the exact phrase "**suffered defeat**" (or "suffered a defeat") when someone loses a game, battle, or competition. Do not include the preposition "from," as "**suffered from defeat**" is grammatically awkward and not a standard English idiom.

The report names no files, tests, or entry points. Start by locating the grammar-rule definitions and existing tests for verb-preposition usage, then compare the reported sentence with the accepted “suffered defeat” and “suffered a defeat” forms. Done means the checker flags “suffered from defeat” without rejecting the valid alternatives.

Written by the indexing model from the issue text.