Three Playwright/Apify bugs that took me way too long to find (and the fixes)

I recently shipped a small Apify Actor — a keyword-based monitor for a government data portal, built with Playwright + Camoufox (a hardened Firefox build for stealth automation). It works, and it's live: it turned out to be a much better debugging exercise than I expected. Three bugs in particular cost me way more time than they should have, so...