Publicize not posting to Facebook again

Publicize on Jetpack isn’t posting links to Facebook again – the others (Twitter, at least) still seem to be working fine but I’ve just realised it stopped a few days ago.

I’ve had the same problem before (https://www.ads-software.com/support/topic/publicize-not-posting-to-facebook?replies=8) and tried the same fix, deleting the FB connection from Publicize and removing the app from FB then linking again, but the most recent post hasn’t worked either.