I was just checking thatm (and didn’t know to remove the “br” from the filename). It looks like the optimizer is off by default and costs $9.95/month).
I’m checking with the site owner to see if they’ve done anything there, which seems highly improbable was the problem. I’m not clear whether they just turned it on (they just noticed some deprecations on the admin panel, so perhaps they did some other “upgrades” too).