>> I've spent some time searching, but I don't see this mentioned anywhere >> else. I don't think it's user error, but there's always that potential. Looks like a bug in Jetty 9.3.22, which is fixed in unreleased Jetty 9.3.23-SNAPSHOT. So, for now, stay on Jetty 9.3.21. https://github.com/eclipse/jetty.project/issues/1797