Just for completeness, now that I’m actually able to successfully troubleshoot, it turns out it was “Remove WordPress block CSS” causing my contact page to break. It only saved me ~4kb turning this on, so it doesn’t seem like any major gain by removing it.
Wow, I spent waayy too long troubleshooting this, and unable to figure out why this was so broken! I had not considered that there was a separate cache, apart from WP_CACHE.
Hi Frank, thanks so much for writing back! So, even with “WP_CACHE” disabled on my staging site, you’re thinking there’s still some magical Flywheel cache that’s being applied?